Aichhorn, A. (1976) Beitrag zur Hummelzucht und zur Biologie von Bombus mendax. Ber. Haus. Nat. Salzbg. 7, 13-29
Alford, D. V. (1975) Bumblebees. David Poynter, London
Bischoff, H. (1931) Entomologische Ergebnisse der Deutsch-Russischen Alai-Pamir-Expedition 1928 (II).4. Hymenoptera VII. Zur Kenntnis einiger Hummelnester aus dem Pamir. Mitt. Zool. Mus. Berl. 16, 860-864
Cameron, S. A., Whitfield, J. B., Cohen, M., Thorp, N. (1999) Novel use of walking trails by the Amazonian bumble bee, Bombus transversalis (Hymenoptera: Apidae). In: Byers, G. W., Hagen, R. H., Brooks, R. W. (eds.) Entomological contributions in memory of Byron A. Alexander, Univ. Kansas Nat. Hist. Mus. Spec. Public. 24, 187-193
Cameron, S. A., Hines, H. M., Williams, P. H. (2007) A comprehensive phylogeny of the bumble bees (Bombus Latreille). Biol. J. Linn. Soc. 91, 161-188 (Pubitemid 46642958)
Haas, A. (1949) Arttypische Flugbahnen von Hummelmännchen. Z. Vgl. Physiol. 31, 281-307
Haas, A. (1976) Paarungsverhalten und Nestbau der alpinen Hummelart Bombus mendax (Hymenoptera: Apidae). Entomol. Germ. 3, 248-259
Kawakita, A., Ascher, J. S., Sota, T., Kato, M., Roubik, D. W. (2008) Phylogenetic analysis of the corbiculate bee tribes based on 12 nuclear protein-coding genes (Hymenoptera: Apoidea: Apidae). Apidologie 39, 163-175 (Pubitemid 351507453)
Kindl, J., Hovorka, O., Urbanová, K., Valterová, I. (1999) Scent marking in male premating behavior of Bombus confusus. J. Chem. Ecol. 25, 1489-1500 (Pubitemid 29357072)
Medler, J. T. (1962) Morphometric studies on bumblebees. Ann. Entomol. Soc. Am. 55, 212-218
Owen, R. E., Plowright, R. C. (1980) Abdominal pile color dimorphism in the bumble bee Bombus melanopygus. J. Hered. 71, 241-247
Rasmont, P. (1983) Catalogue commenté des bourdons de la région ouest-paléarctique (Hymenoptera, Apidae, Bombinae). Notes Faun. Gembloux 7, 1-72
Reinig, W. F. (1930) Untersuchungen zur Kenntnis der Hummelfauna des Pamir-Hochlandes. Z. Morphol. Ökol. Tiere 17, 68-123
Sakagami, S. F. (1976) Specific differences in the bionomic characters of bumblebees. A comparative review. J. Fac. Sci. Hokkaido Univ. Zool. 20, 390-447
Skorikov, A. (1931) Die Hummelfauna Turkestans und ihre Beziehungen zur zentralasiatischen Fauna (Hymenoptera, Bombidae). In: Lindholm, V. A. (ed.) Abhandlungen der Pamir-Expedition 1928, pp. 175-247. Academy of Sciences of the USSR, Leningrad
Williams, P. H. (1985) A preliminary cladistic investigation of relationships among the bumble bees (Hymenoptera, Apidae). Syst. Entomol. 10, 239-255
Williams, P. H. (1991) The bumble bees of the Kashmir Himalaya (Hymenoptera: Apidae, Bombini). Bull. Br. Mus. Nat. Hist. Entomol. 60, 1-204
Williams, P. H. (1998) An annotated checklist of bumble bees with an analysis of patterns of description (Hymenoptera: Apidae, Bombini). Bull. Nat. Hist. Mus. Lond. Entomol. 67, 79-152. updated at http://www.nhm.ac.uk/research- curation/projects/bombus/