Walker, Steven C., Guillaume Guénard, Péter Sólymos, and Pierre Legendre. “Multiple-Table Data in R With the Multitable Package”. Journal of Statistical Software 51, no. 8 (November 13, 2012): 1–38. Accessed April 19, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v051i08.