Ostevik, Katherine, Jessamyn Manson, and James Thomson. “Pollination Potential of Male Bumble Bees (Bombus impatiens): Movement Patterns and Pollen-Transfer Efficiency”. Journal of Pollination Ecology 2 (November 28, 2010): 21–26. Accessed March 28, 2024. https://pollinationecology.org/index.php/jpe/article/view/100.