Kim, Yong Seog, and Erin Crump. “Geospatial Clustering of Psychotropic Substances Crime Locations”. International Journal of Engineering and Management Research 15, no. 4 (August 16, 2025): 45–55. Accessed March 17, 2026. https://ijemr.vandanapublications.com/index.php/j/article/view/1785.