Eletrocardiographic profile of the Holstein-Friesian calves during their first three months of live - De Lucca, G. G; Batista, C. F; Santos, B. P; Lima, D. M; Larsson, Maria Helena Matiko Akao; Pogliani, Fabio Celidonio; Della Libera, Alice Maria Melville Paiva (World Buiatrics Congress, 2012)