21
22
23
Published in 2000
Repository
24
by Barrera, Víctor Hugo; Pumisacho, Manuel; Escudero, Luis; Yumisaca, Fausto; Monar B., Carlos; Norton, George W.; Alwang, Jeffrey; Sherwood, Stephen
Published in 2002
Repository
25
26
27
by Mazón, Nelson; Peralta I., Eduardo; Murillo I., Angel; Falconí-Castillo, Esteban; Monar B., Carlos; Subía G., Cristian; Estrella Sandoval, Ana Paola; Pinzón Z., José
Published in 2007
Repository