Espinoza, Emir, Nersa González, Pedro Aso, Henry Caballero, Jahely Fuenmayor, e Luis Hidalgo. 2000. “Leucogram in heifer sand calves (Holstein) infected with a venezuelan strain of Trypanosoma vivax”. Pesquisa Agropecuária Brasileira 35 (3): 647-52. https://doi.org/10.1590/S1678-3921.pab2000.v35.5815.