Nunes-Silva, P. et al. 2013. The behaviour of Bombus impatiens (Apidae, Bombini) on tomato (Lycopersicon esculentum Mill., Solanaceae) flowers: pollination and reward perception. Journal of Pollination Ecology. 11, (Oct. 2013), 33–40. DOI:https://doi.org/10.26786/1920-7603(2013)3.