Komárek, Arnošt, and Lenka Komárková. “Capabilities of R Package MixAK for Clustering Based on Multivariate Continuous and Discrete Longitudinal Data”. Journal of Statistical Software 59, no. 12 (September 12, 2014): 1–38. Accessed April 24, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v059i12.