Leckie, George. “Runmixregls: A Program to Run the MIXREGLS Mixed-Effects Location Scale Software from Within Stata”. Journal of Statistical Software, Code Snippets 59, no. 2 (August 13, 2014): 1–41. Accessed July 1, 2022. https://www.jstatsoft.org/index.php/jss/article/view/v059c02.