McGill, E., O. Berke, A. Peregrine, and J. S. Weese. “Epidemiology of Canine Heartworm (Dirofilaria Immitis) Infection in Domestic Dogs in Ontario, Canada: Geographic Distribution, Risk Factors and Effects of Climate”. Geospatial Health, Vol. 14, no. 1, May 2019, doi:10.4081/gh.2019.741.