Bispectral monitoring in dogs subjected to ovariohysterectomy and anesthetized with halothane, isoflurane or sevoflurane - Mattos Júnior, Ewaldo de; Ito, Kelly Cristiane; Conti-Patara, Andreza; Carvalho, Haley Silva de; Reinoldes, Adriane; Caldeira, Juliana de Araújo; Cortopassi, Silvia Renata Gaido (Veterinary Anaesthesia and Analgesia, 2011)