Madalena, F. E. (2014) “Milk yield and calving intervals of Holstein-Friesian and crossbred Holstein-Friesian: Gir cows in a high management level”, Pesquisa Agropecuaria Brasileira, 18(2), pp. 195–200. doi: 10.1590/S1678-3921.pab1983.v18.15183.