Savitsky, Terrance, and Susan Paddock. “Bayesian Semi- and Non-Parametric Models for Longitudinal Data With Multiple Membership Effects in R”. Journal of Statistical Software 57, no. 3 (March 13, 2014): 1–35. Accessed May 2, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v057i03.