2550-6722
2550-6722
S2550-67222019000200088
Ecuador
00
08
2019
00
08
2019
8
88
100
[
1991
481-98
]
[
1975
Vol. 4
5
5
6
]
[
1553
]
[
1981
]
[
1966
]
[
2003
33
17-37
]
[
2004
]
[
1993
37
229-57
]
[
1936
]
[
1609
]
[
1993
182-202
]
[
1981
15
17/18
17/18
119-32
]
[
1999
11
12
12
]
[
2003
13-59
]
[
1971
]
[
1965
]
[
1995
]
[
1977
]
[
2006
17
]
[
2008
1548-2008
]
[
2011
2
43
43
243-56
]
[
1878
]
[
2014
]
[
1800
]
[
1972
13
37-51
]
[
1929
]
[
1942
]