Radiographic assessment of cattle hoofs (ungulae) of the Nellore breed: reference standards - Hage, Maria Cristina Ferrarini Nunes Soares; Sousa, Rejane Santos; Chaves, Davi Siqueira; Hage, Raduan; Oliveira, Francisco Leonardo Costa de; Dias, Mailson Rennan Borges; Minami, Natalia Sato; Ercolin, Anna Carolina Mazeto; Cirimbelli, Carolina Fortes; Ortolani, Enrico Lippi (Anatomia, Histologia, Embryologia, 2019)