Fewell, Jennifer H.; Susan M. Bertram (2002). "Evidence for genetic variation in worker task performance by African and European honeybees". Behavioral Ecology and Sociobiology. 52 (4): 318–25. Bibcode:2002BEcoS..52..318F. doi:10.1007/s00265-002-0501-3. S2CID22128779.
Fewell, Jennifer H.; Susan M. Bertram (2002). "Evidence for genetic variation in worker task performance by African and European honeybees". Behavioral Ecology and Sociobiology. 52 (4): 318–25. Bibcode:2002BEcoS..52..318F. doi:10.1007/s00265-002-0501-3. S2CID22128779.
"14 Aug 1914 - BEE CULTURE". Sydney Morning Herald (Nsw : 1842–1954). 14 August 1914. p. 6. Retrieved 20 August 2015.
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Fewell, Jennifer H.; Susan M. Bertram (2002). "Evidence for genetic variation in worker task performance by African and European honeybees". Behavioral Ecology and Sociobiology. 52 (4): 318–25. Bibcode:2002BEcoS..52..318F. doi:10.1007/s00265-002-0501-3. S2CID22128779.