[ARDITTI, J., (1967): Factors affecting the germination of orchid seed. The Botanical Review 33: 1-97.10.1007/BF02858656]Search in Google Scholar
[BOZDEMIR, H., CIG, A., TURKOGLU N. (2018): Effects of different concentrations of carbohydrate form on Orchis Sancta L. propagation in vitro. Applied ecology and environmental research. 16(4):4849-4864.10.15666/aeer/1604_48494864]Search in Google Scholar
[CHEN, Y., GOODALE, U., FAN, H.L., GAO, J.Y. (2015): Asymbiotic seed germination and in vitro seedling development of Paphiopedilum spicerianum: An orchid with an extremely small population in China. Global Ecology and Conservation 3:367-378.10.1016/j.gecco.2015.01.002]Search in Google Scholar
[DAVY, A.J., HUTCHINGS, M.J., ROBERTS, D.L, ROBBIRT, K.M., (2014): Potential Disruption of Pollination in a Sexually Deceptive Orchid by Climatic Change. Current Biology 24: 2845–2849.10.1016/j.cub.2014.10.03325454786]Search in Google Scholar
[GODO, T., KOMORI, M., NAKAOKI, YUKAWA, T., MIYOSHY, K., (2010): Germination of mature seeds of Calanthe tricarinata Lindl., an endangered terrestrial orchid, by asymbiotic culture in vitro. In vitro Cellular and Developmental Biology-Plant 46: 323-328.10.1007/s11627-009-9271-1]Search in Google Scholar
[GUPTA, A., (2016): Asymbiotic Seed Germination in Orchids: Role of Organic Additives. Interantional Advanced Research in Science. Engineering and Technology 3(5): 143-147.]Search in Google Scholar
[HUTCHINGS, M.J., (1989): Population biology and conservation of Ophrys sphegodes, Modern methods in orchid conservation: the role of physiology, ecology and management. Cambridge University press, 101-115.]Search in Google Scholar
[KITSAKI, C.K., ZYGOURAKI, S., ZIOBORA, M., KINTZIOS, S. 2004. In vitro germination, protocorm formation and plantlet development of mature versus immature seeds from several Ophrys species (Orchidaceae). Plant. Cell. Rep. 23: 284–290. KNUDSON, L., (1922): Non-symbiotic germination of orchid seeds. Bot. Gaz. 73: 1–25.10.1086/332956]Search in Google Scholar
[KNUDSON, L., (1946): A new nutrient solution for the germination of orchid seed. American Orchid Society Bulletin 15, 214-217.]Search in Google Scholar
[MALMGREN, C., (1996): Orchid propagation. Theory and practice. In: Allen C (Eds.) North American native terrestrial orchids. Propagation and production. North Am Native Terrestrial Orchid Conf Proc. C. Allen, Germantown, Md. pp. 63–71.]Search in Google Scholar
[MARIĆ, M.M., (1995): Plant tissue culture. Publishing house Draganić, 77-82.]Search in Google Scholar
[PIERCE, S., GUIDI, V., FERRARIO, A., CERIANI, R., LABRA, M., VAGGE, I., CERABOLINI B. (2015): Pea seeds extracts stimulate germination of the terrestrial orchid Ophrys apifera Huds. during a habitat restoration project.]Search in Google Scholar
[PONERT, J., FIGURA, T., VOSOLSOBE, S., LIPAVSKA, H., VOHNIK, M., JERSAKOVA J. (2013): Asymbiotic germination of mature seeds and protocorm development of Pseudorchis albida (Orchidaceae) are inhabited by nitrates even at extremely low concentrations, Botany 91, 662-670.10.1139/cjb-2013-0082]Search in Google Scholar
[PONERT, J., VOSOLSOBE, S., KMECOVA, K., LIPAVSKA, H., (2011): European orchid cultivation – From seed to mature plant. European Journal of Environmental Sciences 1(2): 95-107.]Search in Google Scholar
[RASMUSSEN, H.N., (1995): Terrestrial orchids, from seed to mycotrophic plant. Cambridge University Press, Great Britain.10.1017/CBO9780511525452]Search in Google Scholar
[SGARBI, E., GRIMAUDO, M., DEL PRETE, C., (2009): In vitro asymbiotic germination and seedling development of Limodorum abortivum (Orchidaceae). Plant Biosystems 143, 114–119.10.1080/11263500802633808]Search in Google Scholar
[STEWART, S., KANE, M., (2006): Asymbiotic seed germination and in vitro seedling development of Habanaria macroceratitis (Orchidaceae), a rare Florida terrestrial orchid. Plant Cell, Tissue and Organ Culture 86: 147-158.10.1007/s11240-006-9098-y]Search in Google Scholar
[VAN WAES, J.M,, DEBERGH, P.C. (1986): In vitro germination of some Western European orchids. Physiolia Plantarum 67:253–26110.1111/j.1399-3054.1986.tb02452.x]Search in Google Scholar