Origin and distribution of mitochondrial haplotypes in american mative cattle breeds (Bos taurus): philogenetic network analysis - Miretti, M. M.; Poli, M.; Martinez, G.; Neves, M.; Reynoso, G.; Womach, J.; de Carvalho, J. H.; Ferro, J. H.; Contel, Eucléia Primo Betioli (Congresso Nacional de Genética, 2002)