@article{article3056a511,
title   = {Pharmacokinetics of tramadol administered by intravenous and intramuscular routes to female dogs submitted to ovariohysterectomy},
author = {Sousa, Altamir Benedito de and Santos, Augusto César Dias dos and Flório, Jorge Camilo and Spinosa, Helenice de Souza},
year = {2008},
journal   = {Brazilian Journal of Veterinary Research and Animal Science}
}