Two phylogenetic lineages of Trypanosoma cruzi : evolution and biological meaning - Zingales, Bianca; Souto, Reginaldo Pereira; Stolf, Beatriz Simonsen; Briones, M R S; Coura, J R; Campbell, D; Floeter-Winter, Lucile Maria; Fernandes, O (Reunião Anual da Sociedade Brasileira de Bioquímica e Biologia Molecular, 1998)