Mínguez, Román, Fernando A. López, and Jesús Mur. “Spsur: An R Package for Dealing With Spatial Seemingly Unrelated Regression Models”. Journal of Statistical Software 104, no. 11 (October 30, 2022): 1–43. Accessed December 22, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v104i11.