Amaral, Helena Arantes do, and Maria Helena Matiko Akao Larsson. “Study of the Variation in the Serum Concentrations of Phenobarbital in Dogs Exposured to a Long Term Treatment”. Brazilian Journal of Veterinary Research and Animal Science, vol. 43, no. 4, Aug. 2006, pp. 435-41, https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26457.