Pan, Jianxin, and Yi Pan. “Jmcm: An R Package for Joint Mean-Covariance Modeling of Longitudinal Data”. Journal of Statistical Software 82, no. 9 (December 4, 2017): 1–29. Accessed November 22, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v082i09.