Machado, T. S. de L., Cortopassi, S. R. G., Fantoni, D. T., Cruz, R. S. F. da, & Silva, L. C. L. C. da. (2006). Cardiovascular and pulmonary effects of romifidine and butorphanol combination in horses. Brazilian Journal of Veterinary Research and Animal Science, 43(4), 568-575. https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26474