Grün, Bettina, Ioannis Kosmidis, and Achim Zeileis. “Extended Beta Regression in R: Shaken, Stirred, Mixed, and Partitioned”. Journal of Statistical Software 48, no. 11 (May 24, 2012): 1–25. Accessed December 4, 2021. https://www.jstatsoft.org/index.php/jss/article/view/v048i11.