1. American Cancer Society (ACS) (2016) What are the risk factors for breast cancer? http://www.cancer.org/cancer/breastcancer/detailedguide/breast-cancer-risk-factors (May 2016).
2. American Cancer Society (ACS) (2017a) What are the risk factors for breast cancer? http://www.cancer.org/cancer/breastcancer/detailedguide/breast-cancer-risk-factors (March 2017).
3. ArcGIS, 2017a. How Kernel Density works. http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/how-kernel-density-works.htm (May 2017).
4. ArcGIS, 2017b. Extract Multi Values to Points. http://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/extract-multi-values-to-points.htm (May 2017).