Lees P, Cunningham FM, Elliott J (2004). «Principles of pharmacodynamics and their applications in veterinary pharmacology». J. Vet. Pharmacol. Ther. 27 (6): 397–414. PMID15601436. doi:10.1111/j.1365-2885.2004.00620.x !CS1 manut: Nomes múltiplos: lista de autores (link)
Lees P, Cunningham FM, Elliott J (2004). «Principles of pharmacodynamics and their applications in veterinary pharmacology». J. Vet. Pharmacol. Ther. 27 (6): 397–414. PMID15601436. doi:10.1111/j.1365-2885.2004.00620.x !CS1 manut: Nomes múltiplos: lista de autores (link)