Otani, Takahiro, and Kunihiko Takahashi. “Flexible Scan Statistics for Detecting Spatial Disease Clusters: The Rflexscan R Package”. Journal of Statistical Software 99, no. 13 (October 22, 2021): 1–29. Accessed November 27, 2021. https://www.jstatsoft.org/index.php/jss/article/view/v099i13.