1. Baddeley, Adrian , Rubak, Ege , and Turner, Rolf (2016). Spatial point patterns: methodology and applications with R. Boca Raton London New York: CRC Press, Taylor & Francis Group. ISBN: 9781482210200.
2. Baddeley, Adrian and Turner, Rolf (2005). “spatstat: An R Package for Analyzing Spatial Point Patterns”. In: Journal of Statistical Software 12.6, pp. 1–42. URL: http://www.jstatsoft.org/v12/i06/.
3. Besag, Julian and Newell, James (1991). “The Detection of Clusters in Rare Diseases”. In: Journal of the Royal Statistical Society. Series A (Statistics in Society) 154.1, pp. 143–155. ISSN: 09641998, 1467985X. URL: http://www.jstor.org/stable/2982708.
4. Centers for Disease Control and Prevention (2011). “Vital signs: overdoses of prescription opioid pain relievers—United States, 1999-2008.” eng. In: MMWR Morb Mortal Wkly Rep 60.43, pp. 1487–1492.
5. Diggle, Peter (2014). Statistical analysis of spatial and spatio-temporal point patterns. Boca Raton: CRC Press, Taylor & Francis Group. ISBN: 9781466560239.