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