Uscategui, R. A. R., Tiosso, C., Moro, J. V., Mostachio, G. Q., Padilha-Nakaghi, L. C., Feliciano, M. A. R., & Vicente, W. R. R. (2017). Pre-emptive methadone or tramadol analgesia for mastectomy and ovariohysterectomy in bitches. Revista Colombiana De Ciencias Pecuarias, 30(1), 39–47. https://doi.org/10.17533/udea.rccp.v30n1a05