21
Published in 2011
Repository
22
by Gallegos, Patricio; Castillo C., Carmen; Baez Cevallos, Francisco; Suquillo, Jovanny; Sevillano, Carlos; Asaquibay, César; Meneses, A.; Chulde, F.
Published in 2010
Repository
23
24
Published in 2012
Repository
25
Published in 1994
Repository
26
Published in 2011
Repository
27
28
Published in 1997
Repository
29
Published in 1990
Repository
30
Published in 2001
Repository
31
32
Published in 1997
Repository
33
34
Published in 2003
Repository
35
36
37
Published in 2017
Repository
38
Published in 2010
Repository
39
40