Payton, Quinn C., Michael G. McManus, Marc H. Weber, Anthony R. Olsen, and Thomas M. Kincaid. “Micromap: A Package for Linked Micromaps”. Journal of Statistical Software 63, no. 2 (February 10, 2015): 1–16. Accessed October 6, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v063i02.