Harrop, Mabel Hanna V., et al. “Incidence of Bovine Mastitis the “ Dairy Bascin” of the Southern ‘Agreste’ Zone in Pernambuco State, Brazil”. Pesquisa Agropecuaria Brasileira, vol. 10, no. 8, Apr. 2014, pp. 65-67, https://doi.org/10.1590/S1678-3921.pab1975.v10.17174.