Viana, J. G. L. (1992) “Evaluation of prevalence, diagnostic, and surgical treatment of cancerous lesions of the ocular region in Hereford and Polled hereford cattle”, Pesquisa Agropecuaria Brasileira, 27(10), pp. 1397–1404. doi: 10.1590/S1678-3921.pab1992.v27.3783.