1. Cockerham, C. Clark. “VARIANCE OF GENE FREQUENCIES”. Evolution, vol. 23, no. 1, 1969, pp. 72–84, https://doi.org/10.1111/j.1558-5646.1969.tb03496.x, https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1558-5646.1969.tb03496.x.