Du, Yu, and Ravi Varadhan. “SQUAREM: An R Package for Off-the-Shelf Acceleration of EM, MM and Other EM-Like Monotone Algorithms”. Journal of Statistical Software 92, no. 7 (February 23, 2020): 1–41. Accessed May 1, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v092i07.