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Schmid-Hempel, R.; Schmid-Hempel, P. (2000-02-01). "Female mating frequencies in Bombus spp. from Central Europe". Insectes Sociaux. 47 (1): 36–41. doi:10.1007/s000400050006. ISSN0020-1812.
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Alford, D. V. (1969-02-01). "A Study of the Hibernation of Bumblebees (Hymenoptera:Bombidae) in Southern England". Journal of Animal Ecology. 38 (1): 149–170. doi:10.2307/2743. JSTOR2743.
Kawakita, Atsushi; Sota, Teiji; Ito, Masao; Ascher, John S.; Tanaka, Hiroyuki; Kato, Makoto; Roubik, David W. (2004-05-01). "Phylogeny, historical biogeography, and character evolution in bumble bees (Bombus: Apidae) based on simultaneous analysis of three nuclear gene sequences". Molecular Phylogenetics and Evolution. 31 (2): 799–804. doi:10.1016/j.ympev.2003.12.003. PMID15062814.
Lye, Gillian C.; Osborne, Juliet L.; Park, Kirsty J.; Goulson, Dave (2011-11-23). "Using citizen science to monitor Bombus populations in the UK: nesting ecology and relative abundance in the urban environment". Journal of Insect Conservation. 16 (5): 697–707. doi:10.1007/s10841-011-9450-3. ISSN1366-638X.
Schmid-Hempel, R.; Schmid-Hempel, P. (2000-02-01). "Female mating frequencies in Bombus spp. from Central Europe". Insectes Sociaux. 47 (1): 36–41. doi:10.1007/s000400050006. ISSN0020-1812.