Ollerton, J. and Nuttman, C. 2013. Aggressive displacement of Xylocopa nigrita carpenter bees from flowers of Lagenaria sphaerica (Cucurbitaceae) by territorial male Eastern Olive Sunbirds (Cyanomitra olivacea) in Tanzania. Journal of Pollination Ecology. 11, (May 2013), 21–26. DOI:https://doi.org/10.26786/1920-7603(2013)7.