Baghfalaki, Taban, and Mojtaba Ganjali. “A Fast Algorithm for Using Semi-Parametric Random Effects Model for Analyzing Longitudinal Data”. Statistics, Optimization & Information Computing 2, no. 4 (November 21, 2014): 339-351. Accessed November 15, 2024. http://47.88.85.238/index.php/soic/article/view/20141205.