BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Enrich, Heber P Principal Guelman, Nancy P Principal Larcanché, Audrey P Principal Liousse, Isabelle P Principal Diffeomorphisms having rotation sets with non-empty interior Vol. 22 pp. 1899-1907