Schilling, Andrea; Macias Parra, Mercedes; Gutierrez, Maricruz; Restrepo, Jaime; Ucros, Santiago; Herrera, Teobaldo; Engel, Eli; Huicho, Luis; Shew, Marcia; Maansson, Roger; Caldwell, Nicole; Luxembourg, Alain; Sobanjo ter Meulen, Ajoke
(Elsevier, 2001)