[Angold, P. G., Sadler, J. P., Hill, M. O., Pullin, A., Rushton, S., Austin, K., Small, E., Wood, B., Wadsworth, R., Sanderson, R. & Thompson, K. 2006: Biodiversity in urban habitat patches. Science of the Total En vironment 360: 196–204. DOI: https://doi.org/10.1016/j.scitotenv.2005.08.03510.1016/j.scitotenv.2005.08.03516297440]Search in Google Scholar
[Baldock, K., Goddard, M. A., Hicks, D. M., Kunin, W. E., Mitschunas, N., Osgathorpe, L. M., Potts, S. G., Robertson, K. M., Scott, A. V., Stone, G. N., Vaughan, I. P. & Memmott, J. 2015: Where is the UK’s pollinator biodiversity? The importance of urban areas for flower-visiting insects. Proceedings of the Royal Society B 282: 20142849. DOI: http://dx.doi.org/10.1098/rspb.2014.2849.10.1098/rspb.2014.2849434545425673686]Search in Google Scholar
[Bates, R. G., Bower, V. E. & Smith, E. R. 1956: Calcium Hydroxide as a Highly Alkaline pH Standard. Research Paper 2680. Journal of Research of the National Bureau of Standards 56: 305–311.10.6028/jres.056.040]Search in Google Scholar
[Brandes, D. 2010: Contributions to the wall flora of Albania. http://www.ruderal-vegetation.de/verschiedene_regionen/Albania.pdf]Search in Google Scholar
[Brullo, S., R. Guarino. 1998: Syntaxonomy of the Parietarietea judaicae class in Europe. Ann Bot (Roma). 56: 109–146.]Search in Google Scholar
[Buczkowski, G. & D. S. Richmond: 2012: The Effect of Urbanization on Ant Abundance and Diversity: A Temporal Examination of Factors Affecting Biodiversity. PLoS One 7: e41729. DOI: https://doi.org/10.1371/journal.pone.004172910.1371/journal.pone.0041729341090122876291]Search in Google Scholar
[Celesti-Grapow, L., Pysek, P., Jarosık, V. & Blasi, C. 2006: Determinants of native and alien species richness in the urban flora of Rome. Diversity and Distributions 12: 490–501.10.1111/j.1366-9516.2006.00282.x]Search in Google Scholar
[Chocholouskova, Z. & Pysek, P. 2003: Changes in composition and structure of urban flora over 120 years: a case study of the city of Plzen. Flora 198: 366–376.10.1078/0367-2530-00109]Search in Google Scholar
[Darlington, A. 1981: Ecology of Walls. Heinemann Educational, London, 64pp.]Search in Google Scholar
[Duchoslav, M. 2002: Flora and vegetation of stony walls in East Bohemia (Czech Republic). Preslia 74: 1–25.]Search in Google Scholar
[Euro+Med Plant Base. 2019: The information resource for Euro-Mediterranean plant diversity. http://ww2.bgbm.org/EuroPlusMed/query.asp]Search in Google Scholar
[Francis, R. A., 2011: Wall ecology: A frontier for urban biodiversity and ecological engineering. Prog. Phys. Geograph. 35: 43–63.10.1177/0309133310385166]Search in Google Scholar
[Gaston, K. J. ed. 2010: Urban Ecology. Cambridge University Press, Cambridge, UK.]Search in Google Scholar
[Geslin B., Gauzens, B., Thebault, E. & Dajoz, I. 2013: Plant-pollinator networks along a gradient of urbanisation. PLoS ONE 8, e63421. DOI: https://doi.org/10.1371/journal.pone.006342110.1371/journal.pone.0063421366159323717421]Search in Google Scholar
[Godefroid, S. & Koedam, N. 2007: Urban plant species patterns are highly driven by density and function of built-up areas. Landscape Ecology 22: 1227–1239.10.1007/s10980-007-9102-x]Search in Google Scholar
[Grime, J. P. 2001: Plant strategies, vegetation processes, and ecosystem properties. John Wiley & Sons, Chichester, UK.]Search in Google Scholar
[Groves, R. H. & di Castri. F., eds. 1991: Biogeography of Mediterranean invasions. Cambridge University Press, Cambridge.10.1017/CBO9780511525544]Search in Google Scholar
[Holland, P. G. 1972: The pattern of species density of old stone walls in western Ireland. Journal of Ecology 3: 799–805.10.2307/2258566]Search in Google Scholar
[Jasprica, N., Škvorc, Z., Pandža, M., Milović, M., Purger, D., Krstonošić, D., Kovačić, S., Sandev, D., Lasić, A., Caković, D., Stešević, D., Anđić, B. & Stanišić-Vujačić, M. 2020: Phytogeographic and syntaxonomic diversity of wall vegetation (Cymbalario-Parietarietea diffusae) in southeastern Europe. Plant Biosystems. DOI: https://doi.org/10.1080/11263504.2020.1762794.10.1080/11263504.2020.1762794]Search in Google Scholar
[Jim, C. Y. 1998: Old stone walls as an ecological habitat for urban trees in Hong Kong. Landscape and Urban Planning 42: 29–43.10.1016/S0169-2046(98)00072-3]Search in Google Scholar
[Jim, C. Y. & Chen, W. Y. 2010: Habitat effect on vegetation ecology and occurrence on urban masonry walls. Urban Forestry & Urban Greening 9: 169–178. DOI: https://doi.org/10.1016/j.ufug.2010.02.00410.1016/j.ufug.2010.02.004]Search in Google Scholar
[Kolbek, J. 1997: Plant communities on walls in the Czech Republic – preliminary notes. Zpráv České Botanické Společnosti 32 Mater 15: 61–67.]Search in Google Scholar
[Kolbek, J, Valachovic, M. & Misikova, K. 2015: Wall vegetation in old royal mining towns in central Slovakia. Hacquetia 14: 249–263. DOI: https://doi.org/10.1515/hacq-2015-000710.1515/hacq-2015-0007]Search in Google Scholar
[Kuhn, I., Brandl, R., May, R. & Klotz, S. 2004: The flora of German cities is naturally species rich. Evolutionary Ecology Research 6: 749–764.]Search in Google Scholar
[Láníková, D. & Lososová, Z. 2009: Rocks and walls: natural versus secondary habitats. Folia Geobotanica 44: 263–280.10.1007/s12224-009-9045-x]Search in Google Scholar
[Lisci, M. & Pacini, E. 1993: Plants growing on the walls of Italian towns. 1. Sites and distribution. Phyton (Horn, Austria) 33: 15–26.]Search in Google Scholar
[Lososová, Z & Láníková, D. 2010: Differences in trait compositions between rocky natural and artificial habitats. Journal of Vegetation Science 21: 520–530.10.1111/j.1654-1103.2009.01160.x]Search in Google Scholar
[Lundholm, J. T. & Richardson, P. J. 2010: Mini-review: Habitat analogues for reconciliation ecology in urban and industrial environments. Journal of Applied Ecology 47: 966–975.10.1111/j.1365-2664.2010.01857.x]Search in Google Scholar
[Madrea, F., Clergeau, P., Machona, N & Vergnes, A. 2015: Building biodiversity: Vegetated façades as habitats for spider and beetle assemblages. Global Ecology and Conservation 3: 222–233.10.1016/j.gecco.2014.11.016]Search in Google Scholar
[McCune, B. & Mefford, M. J. 2006: PC-ORD, multivariate analysis of ecological data, version 5.0. MjM Software Design, Gleneden Beach, OR, USA.]Search in Google Scholar
[McIntyre, N. E., Rango, J., Fagan, W. F. & Faeth, S. H. 2001: Ground arthropod community structure in a heterogeneous urban environment. Landscape and Urban Planning 52: 257–274. DOI: doi: 10.1016/S0169-2046(00)00122-510.1016/S0169-2046(00)00122-5]Search in Google Scholar
[Naveh, Z. & Vernet, J.-L. 1991: The palaeohistory of the Mediterranean biota. In: Groves, R. H. & di Castri, F. (eds.): Biogeography of Mediterranean invasions. Cambridge University Press, Cambridge, pp. 19–32.]Search in Google Scholar
[Paparisto, K. Demiri, M. Mitrushi, I. Qosja Xh. 1988: Flora e Shqipërisë 1. Lycopodiaceae – Platanaceae. ASHRPSSH–Qendra e Kërkimeve Biologjike, Tiranë. 1–457.]Search in Google Scholar
[Pils, G. 2016: Illustrated Flora of Albania. Christian Theiss GmbH, 9431 St. Stefan. 576 p.]Search in Google Scholar
[Qosja, Xh., Paparisto, K. Demiri, M. Vangjeli, J. Balza E. 1992: Flora e Shqipërisë 2. Rosaceae – Umbelliferae. ASHRSH–Qendra e Kërkimeve Biologjike, Tiranë. 446 p.]Search in Google Scholar
[Qosja Xh., Paparisto, K. Vangjeli J. Ruci, B. Mullaj A. 1996: Flora e Shqipërisë 3. Pirolaceae – Campanulaceae. ASHRSH–Instituti i Kërkimeve Biologjike, Tiranë. 331 p.]Search in Google Scholar
[Ricotta, C., Celesti-Grapow, L., Avena, G. & Blasi, C. 2001: Topological analysis of the spatial distribution of plant species richness across the city of Rome (Italy) with the echelon approach. Landscape and Urban Planning 57: 69–76.10.1016/S0169-2046(01)00187-6]Search in Google Scholar
[Simonová, D. 2008: Alien flora on walls in southern and western Moravia (Czech Republic). In: TokarskaGuzik, B., Brock, J. H., Brundu, G., Child, L., Daehler, C. C. & Pysek, P. (eds.): Plant invasions: human perception, ecological impacts and management. Backhuys Publishers, Leiden, pp. 317–332.]Search in Google Scholar
[SPSS. 2017: IBM SPSS Statistics for Windows, Version 25.0. Armonk, NY: IBM Corp.]Search in Google Scholar
[Sternberg, M. & Shoshany, M. 2001: Influence of slope aspect on Mediterranean woody formations: comparison of a semiarid and an arid site in Israel. Ecological Research 16: 335–345.10.1046/j.1440-1703.2001.00393.x]Search in Google Scholar
[Świerkosz, K. 2004: Notes on the syntaxonomy of the Asplentia trichomanis class in Poland. Polish Botanical Journal 49: 203–213.]Search in Google Scholar
[Świerkosz, K. 2012: Notes on the wall vegetation of the Lake Garda surroundings (North Italy) and its consequences to the syntaxonomy of Tortulo-Cymbalarietalia Segal 1969. Časopsis Slezskeho Muzea, serie A 61: 11–22.]Search in Google Scholar
[ter Braak, C. J. F. & Smilauer, P. 2002: CANOCO reference manual and CanoDraw for Windows users guide. Software for Canonical Community Ordination (version 4.5). Biometris, Wageningen, NL.]Search in Google Scholar
[The Plant List. (2013): Version 1.1. Published on the Internet: http://www.theplantlist.org/]Search in Google Scholar
[Thompson, K. & McCarthy, M. A. 2008: Traits of British alien and native urban plants. Journal of Ecology 96: 853–859.10.1111/j.1365-2745.2008.01383.x]Search in Google Scholar
[Tutin, T. G., Burges, N. A. Chater, A. O. Edmondson, J. R. Heywood, V. H. Moore, D. M. Valentine, D. H. Walters, S. M. Webb D. A. 1964: Flora Europaea–Vol. 1 Lycopodiaceae to Platanaceae. Cambridge. At the University Press. Cambridge, London, New York, Melbourne. 581 p.]Search in Google Scholar
[Tutin, T. G., Heywood, V. H. Burges, N. A. Moore, D. M. Valentine, D. H. Walters, S. M. Webb D. A. 1968: Flora Europaea–Vol. 2 (Rosaceae to Umbelliferae), Cambridge University Press. 454 p.]Search in Google Scholar
[Tutin, T. G., Heywood, V. H. Burges, N. A. Moore, D. M. Valentine, D. H. Walters, S. M. Webb D. A. 1972: Flora Europaea–Vol. 3 Diapensiaceae to Myoporaceae. Cambridge University Press. 370 p.]Search in Google Scholar
[Tutin, T. G., Heywood, V. H. Burges, N. A. Moore, D. M. Valentine, D. H. Walters, S. M. Webb D. A. 1976: Flora Europaea–Vol. 4. Plantaginaceae to Compositae and Rubiaceae. Cambridge University Press. 505 p.]Search in Google Scholar
[Tutin, T. G., Heywood, V. H. Burges, N. A. Moore, D. M. Valentine, D. H. Walters, S. M. Webb D. A. 1980: Flora Europaea–Vol. 5. Alismataceae to Orchidaceae (Monocotiledones), Cambridge University Press. 452 p.]Search in Google Scholar
[Vangjeli, J. Ruci, B. Mullaj, A. Paparisto, K. Qosja Xh. 2000: Flora e Shqipërisë 4. Compositae – Orchidaceae. ASHRSH-Instituti i Kërkimeve Biologjike, Tiranë. 502 p.]Search in Google Scholar
[Wild Blueberry Media LLC. 2018: PC-ORD. Corvallis, OR, USA.]Search in Google Scholar
[Williams, N. S. G., Schwartz, M. W., Vesk, P. A., McCarthy, M. A., Hahs, A. K., Clemants, S. E., Corlett, R. T., Duncan, R. P., Norton, B. A. & Thompson, K. 2009: A conceptual framework for predicting the effects of urban environments on floras. Journal of Ecology 97, 4–9. DOI: https://doi.org/10.1111/j.1365-2745.2008.01460.x10.1111/j.1365-2745.2008.01460.x]Search in Google Scholar
[Wittig, R. 2002: Siedlungsvegetation. Ulmer, Stuttgart, 552 p.]Search in Google Scholar
[Woodell, S. & Rossiter, J. 1959: The flora of Durham walls. Proceedings of the Botanical Society of the British Isles 2: 257–273.]Search in Google Scholar
[Yalcinalp, E. & Meral, A. 2017: Wall vegetation characteristics of urban and sub-urban areas. Sustainability 9: 1691.10.3390/su9101691]Search in Google Scholar