Lints, FA., Lints, CV., Bullens, P., Bourgois, M., & Delince, J. (1989). Unexplained Variations in Life-span of the Oregon-r Strain of Drosophila-melanogaster Over a 4-year Period. Experimental Gerontology, 24(3), 265-271. https://doi.org/10.1016/0531-5565(89)90017-X (Original work published 1989)