1
Published in 2003
Repository
2
3
Published in 1988
Repository
4
Published in 1986
Repository
5
Published in 1984
Repository
6
7
Published in 1978
Repository
8
9
Published in 1989
Repository
10
Published in 1988
Repository
11
12
by Caviedes C., Mario; Yánez G., Carlos; Silva, Edison; Dobronsky, Jorge; Caicedo, Marlon; Zambrano Mendoza, José Luis; Heredia, Jorge
Published in 2002
Repository
13
Published in 1987
Repository
14
Published in 2003
Repository
15
Published in 2003
Repository
16
Published in 1999
Repository
17
Published in 1990
Repository
18
19
20