34) Hostetler, M. et al. How Effective and Humane is Trap-Neuter-Release (TNR) for Feral Cats? University of Florida IFAS Extension. https://edis.ifas.ufl.edu/publication/UW468
52) Boone, J.D. et al. A Long-Term Lens: Cumulative Impacts of Free-Roaming Cat Management Strategy and Intensity on Preventable Cat Mortalities. Front. Vet. Sci., 26 July 2019. https://www.frontiersin.org/articles/10.3389/fvets.2019.00238/full
59) Jessup, David A. The welfare of feral cats and wildlife. AVMA, Vol 225, No. 9, November 1, 2004. https://www.hahf.org/wp-content/uploads/media-4/Jessup-article-on-Wildlife-impact-javma_225_9_1377.pdf
60) Reece, JF et al. Fecundity and longevity of roaming dogs in Jaipur, India. BMC Veterinary Research volume 4, Article number: 6 (2008). https://bmcvetres.biomedcentral.com/articles/10.1186/1746-6148-4-6
61) Massei, G. and LA Miller. Nonsurgical fertility control for managing free-roaming dog populations: a review of products and criteria for field applications. Theriogenology. 2013 Nov;80(8):829-38. https://pubmed.ncbi.nlm.nih.gov/23998740/