Nagamitsu, Teruyoshi; Tsukuba, Sa-aya; Ushirokita, Fumi; Konno, Yasuo (2012). "Foraging habitats and floral resource use by colonies of long- and short-tongued bumble bee species in an agricultural landscape with kabocha squash fields". Applied Entomology and Zoology. 47 (3): 181–190. doi:10.1007/s13355-012-0106-x. S2CID256092194.
Nishikawa, Yoko; Shimamura, Takashi (2016-02-01). "Effects of alien invasion by Bombus terrestris L. (Apidae) on the visitation patterns of native bumblebees in coastal plants in northern Japan". Journal of Insect Conservation. 20 (1): 71–84. doi:10.1007/s10841-015-9841-y. ISSN1572-9753. S2CID17924193.
Kanbe, Yuya; Okada, Ikuko; Yoneda, Masahiro; Goka, Koichi; Tsuchida, Koji (October 2008). "Interspecific mating of the introduced bumblebee Bombus terrestris and the native Japanese bumblebee Bombus hypocrita sapporoensis results in inviable hybrids". Die Naturwissenschaften. 95 (10): 1003–1008. Bibcode:2008NW.....95.1003K. doi:10.1007/s00114-008-0415-7. ISSN0028-1042. PMID18594790. S2CID23981043.
Goka, Kouichi; Okabe, Kimiko; Yoneda, Masahiro (2006). "Worldwide migration of parasitic mites as a result of bumblebee commercialization". Population Ecology. 48 (4): 285–291. doi:10.1007/s10144-006-0010-8. ISSN1438-390X. S2CID23528427.
Nagamitsu, Teruyoshi; Tsukuba, Sa-aya; Ushirokita, Fumi; Konno, Yasuo (2012). "Foraging habitats and floral resource use by colonies of long- and short-tongued bumble bee species in an agricultural landscape with kabocha squash fields". Applied Entomology and Zoology. 47 (3): 181–190. doi:10.1007/s13355-012-0106-x. S2CID256092194.
Nishikawa, Yoko; Shimamura, Takashi (2016-02-01). "Effects of alien invasion by Bombus terrestris L. (Apidae) on the visitation patterns of native bumblebees in coastal plants in northern Japan". Journal of Insect Conservation. 20 (1): 71–84. doi:10.1007/s10841-015-9841-y. ISSN1572-9753. S2CID17924193.
Kanbe, Yuya; Okada, Ikuko; Yoneda, Masahiro; Goka, Koichi; Tsuchida, Koji (October 2008). "Interspecific mating of the introduced bumblebee Bombus terrestris and the native Japanese bumblebee Bombus hypocrita sapporoensis results in inviable hybrids". Die Naturwissenschaften. 95 (10): 1003–1008. Bibcode:2008NW.....95.1003K. doi:10.1007/s00114-008-0415-7. ISSN0028-1042. PMID18594790. S2CID23981043.
Goka, Kouichi; Okabe, Kimiko; Yoneda, Masahiro (2006). "Worldwide migration of parasitic mites as a result of bumblebee commercialization". Population Ecology. 48 (4): 285–291. doi:10.1007/s10144-006-0010-8. ISSN1438-390X. S2CID23528427.
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Nishikawa, Yoko; Shimamura, Takashi (2016-02-01). "Effects of alien invasion by Bombus terrestris L. (Apidae) on the visitation patterns of native bumblebees in coastal plants in northern Japan". Journal of Insect Conservation. 20 (1): 71–84. doi:10.1007/s10841-015-9841-y. ISSN1572-9753. S2CID17924193.
Kanbe, Yuya; Okada, Ikuko; Yoneda, Masahiro; Goka, Koichi; Tsuchida, Koji (October 2008). "Interspecific mating of the introduced bumblebee Bombus terrestris and the native Japanese bumblebee Bombus hypocrita sapporoensis results in inviable hybrids". Die Naturwissenschaften. 95 (10): 1003–1008. Bibcode:2008NW.....95.1003K. doi:10.1007/s00114-008-0415-7. ISSN0028-1042. PMID18594790. S2CID23981043.
Goka, Kouichi; Okabe, Kimiko; Yoneda, Masahiro (2006). "Worldwide migration of parasitic mites as a result of bumblebee commercialization". Population Ecology. 48 (4): 285–291. doi:10.1007/s10144-006-0010-8. ISSN1438-390X. S2CID23528427.