O’Neill, Dan G; Church, David B; McGreevy, Paul D; Thomson, Peter C; Brodbelt, David C (2014-06-12). "Longevity and mortality of cats attending primary care veterinary practices in England". Journal of Feline Medicine and Surgery. 17 (2). SAGE Publications: 125–133. doi:10.1177/1098612x14536176. ISSN1098-612X. PMID24925771.
O’Neill, Dan G; Church, David B; McGreevy, Paul D; Thomson, Peter C; Brodbelt, David C (2014-06-12). "Longevity and mortality of cats attending primary care veterinary practices in England". Journal of Feline Medicine and Surgery. 17 (2). SAGE Publications: 125–133. doi:10.1177/1098612x14536176. ISSN1098-612X. PMID24925771.
O’Neill, Dan G; Church, David B; McGreevy, Paul D; Thomson, Peter C; Brodbelt, David C (2014-06-12). "Longevity and mortality of cats attending primary care veterinary practices in England". Journal of Feline Medicine and Surgery. 17 (2). SAGE Publications: 125–133. doi:10.1177/1098612x14536176. ISSN1098-612X. PMID24925771.