Álvarez, Inmaculada C., Javier Barbero, and José L. Zofío. “A Panel Data Toolbox for MATLAB”. Journal of Statistical Software 76, no. 6 (January 11, 2017): 1–27. Accessed April 20, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v076i06.