-
1by Ferraz,Marcos Bosi, Pereira,Ronaldo Borges, Andrade,Luis Eduardo Coelho, Atra,Edgard
Published 1991Digital revistaSCIELO -
2by Szejnfeld,Vera Lucia, Souen,Jorge Saad, Baracat,Edmund Chada, Atra,Edgard, Lima,Geraldo Rodrigues de
Published 1994Digital revistaSCIELO