[Ahrne K. (2008) - Local Management and Landscape Effect on Diversity of Bees, Wasps and Birds in Urban Green Area, [online] http://pub.epsilon.slu.se/1766/1/Kappan.pdf. ]Search in Google Scholar
[Blarer A., Keasar T., Shmida A. (2002) - Possible mechanisms for the Formation of Flower Size Preferences by Foraging Bumblebees. Ethology, 108: 341-351. 10.1046/j.1439-0310.2002.00778.x]Search in Google Scholar
[Brodie L. (1996) - Bumblebee Foraging Preferences: Differences between Species and indywiduals, [online] http://www.bumblebee.org/thesis/thesis.pdf. ]Search in Google Scholar
[Comba L., Corbet S. A., Hunt L., Warren B. (1999) - Flowers Nectar and Insect Visit: Evaluating British Plant species for pollinator Friendly gardens. Ann. Botany, 83: 369-383. ]Search in Google Scholar
[Darwin C. (1891) - The effects of cross and self fertilisation in the vegetable kingdom, The Complete Work of Charles Darwin Online, [online] Darwin-online.org.uk. 10.5962/bhl.title.51079]Search in Google Scholar
[Dylewska M. (1996) - Nasze Trzmiele. Ośrodek Doradztwa Rolniczego, APW, Karniowice, pp. 256. ]Search in Google Scholar
[Dylewska M., Flaga S. (2000) - Barwny klucz do rozpoznawania w warunkach polowych krajowych gatunków trzmieli. Polski Klub Ekologiczny, Kraków, pp. 80. ]Search in Google Scholar
[Frisch K. von (1977) - Aus dem Leben der Bienen, Springer Verlag, Berlin, pp. 194. ]Search in Google Scholar
[Goulson D., Hawson S. A., Stout J. C. (1998) - Foraging bumblebees avoid flowers already visited by specific or by other bumblebee species. Anim. Behav., 55: 199-206. ]Search in Google Scholar
[Goulson D., Darvill B. (2004) - Niche overlap and diet breath in bumblebees; are rare species more specialized in their choice of flowers? Apidologie, 35: 55-63. 10.1051/apido:2003062]Search in Google Scholar
[Goulson D. (2005) - Causes of rarity in bumblebees. Biol. conserv., 125: 1-8.]Search in Google Scholar
[Goulson D., Hanley M. E., Darvill B., Ellis J. S. (2006) - Biotope associations and decline of bumblebees (Bombus spp.). J. InsectConserv., 10: 95-103. ]Search in Google Scholar
[Gumbert A. (2000) - Color choices by bumble bees (Bombus terrestris): innate preferences and generalization after lerning. Behav. Ecol.Sociobiol., 48: 36-43. ]Search in Google Scholar
[Inouye D. W. (1980) - The effect of proboscis and corolla tube lengths on patterns and rates of flower visitation by bumblebees. Oecologia, 45: 197-201. 10.1007/BF0034646028309530]Search in Google Scholar
[Kowalczyk J. K., Szczepko K., Kurzac T., Pawlikowski T. (2004) - Pszczoły (Hymenoptera, Apoidea) Ogrodu Botanicznego w Łodzi, [in:] Fauna miast Europy Środkowej 21. wieku, red. Barczak T., Indykiewicz P., Wyd. LOGO Bydgoszcz, pp. 67-83. ]Search in Google Scholar
[Pawlikowski T. (2008) - A distribution Atlas of Bumblebees in Poland (Hymenoptera: Apoidea: Bombini). Wyd. Nauk. Uniwersytetu Mikołaja Kopernika, Toruń, pp. 103. ]Search in Google Scholar
[Pyke G. H. (1982) - Local geographic distributions of bumblebees near Crested Butte, Colorado: competition and community structure. Ecology, 63: 555-573. 10.2307/1938970]Search in Google Scholar
[Raine E. N., Chittka L. (2007a) - Flower Constancy and Memory Dynamics in Bumblebees (Hymenoptera: Apidae: Bombus). Entomol. Gene., 29(2-4): 179-199.10.1127/entom.gen/29/2007/179]Search in Google Scholar
[Raine N. E., Chittka L. (2007b) - The Adaptive significance of Sensory Bias in Foraging Context: Floral Colour Preferences in the Bumblebee Bombus terrestris. PLoS ONE, 2(6): e556. 10.1371/journal.pone.0000556189108817579727]Search in Google Scholar
[Ruszkowski A. (1998) - Rośliny wskaźnikowe dla trzmieli (Bombus Latr.) krótkojęzyczkowych; długo- i średniojęzyczkowych. Pszczeln. Zesz. Nauk. Rok XLII, 1: 321-332; 333-343]Search in Google Scholar
[Ruszkowski A., Biliński M., Gosek J., Kaczmarska K., Zadura M. (1998) - Terminy pojawu trzmieli (Bombus Latr.) wiosną i możliwość ich prognozowania. Pszczeln. Zesz. Nauk. Rok XLII, 1: 345-353. ]Search in Google Scholar
[Seguin F. R., Plowright C. M. S. (2008) - Assessment of patern preferences by flowernaive bumblebees. Apidologie, 39: 215-224. 10.1051/apido:2007056]Search in Google Scholar
[Szafer W. (1969) - Kwiaty i zwierzęta, PWN, Warszawa, pp. 386. ]Search in Google Scholar
[Teper D. (2005) - Comparison of food plants of Bombus terrestris L. and Bombus lapidarius L. based on pollen analysis of their pollen loads. J. Apic. Sci., 49(2): (43-50). ]Search in Google Scholar
[Teper D. (2006) - Food plants of Bombusterrestris L. as determined by pollen analysis of feaces. J. Apic. Sci., 50(2): 101-108. ]Search in Google Scholar
[Whithney H. M., Dyer A., Chittka L., Rands S. A., Glover B. J. (2008) - The interaction of temperature and sucrose concentration on foraging preferences in bumblebees. Naturwissenschaften, 95: 845-85. 10.1007/s00114-008-0393-918523748]Search in Google Scholar
[Williams P. H., Osborne J. L. (2009) - Bumblebee vulnerability and conservation world-wide. Apidologie, 40: 367-387.10.1051/apido/2009025]Search in Google Scholar