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Slater, Margaret R (2001). «The role of veterinary epidemiology in the study of free-roaming dogs and cats». Preventive Veterinary Medicine. 48 (4): 273–86. doi:10.1016/S0167-5877(00)00201-4. PMID11259820.
Høgåsen, H.R; Er, C; Di Nardo, A; Dalla Villa, P (2013). «Free-roaming dog populations: A cost-benefit model for different management options, applied to Abruzzo, Italy». Preventive Veterinary Medicine. 112 (3–4): 401–13. doi:10.1016/j.prevetmed.2013.07.010. PMID23973012.
Lord, Kathryn; Feinstein, Mark; Smith, Bradley; Coppinger, Raymond (2013). «Variation in reproductive traits of members of the genus Canis with special attention to the domestic dog (Canis familiaris)». Behavioural Processes. 92: 131–142. doi:10.1016/j.beproc.2012.10.009. PMID23124015. S2CID9748685.
Lord, Kathryn; Feinstein, Mark; Smith, Bradley; Coppinger, Raymond (2013). «Variation in reproductive traits of members of the genus Canis with special attention to the domestic dog (Canis familiaris)». Behavioural Processes. 92: 131–142. doi:10.1016/j.beproc.2012.10.009. PMID23124015. S2CID9748685.