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Carvell, Claire; Rothery, Peter; Pywell, Richard F.; Heard, Matthew S. (2008-06-01). "Effects of resource availability and social parasite invasion on field colonies of Bombus terrestris". Ecological Entomology. 33 (3): 321–327. doi:10.1111/j.1365-2311.2007.00961.x. ISSN1365-2311.
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