1
2
3
Published in 2008
Repository
4
Published in 2013
Repository
5
Published in 2008
Repository
6
7
Published in 1985
Repository
8
Published in 2013
Repository
9
10
11
12
Published in 2011
Repository
13
14
15
16
17
Published in 2003
Repository
18
19
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
20
Published in 1991
Repository