McLachlan, G., Ng, A., Adams, P., McGiffin, D.C. and Gailbraith, A. 1997. An Algorithm for Fitting Mixtures of Gompertz Distributions to Censored Survival Data. Journal of Statistical Software. 2, 7 (Nov. 1997), 1–23. DOI:https://doi.org/10.18637/jss.v002.i07.