Molina, J. Gabriel, Ruben Ledesma, Pedro M. Valero-Mora, and Forrest W. Young. “A Video Tour through ViSta 6.4”. Journal of Statistical Software 13, no. 8 (December 20, 2004): 1–13. Accessed September 30, 2022. https://www.jstatsoft.org/index.php/jss/article/view/v013i08.