1390-860X
1390-860X
S1390-860X2017000100014
10.17163/ings.n18.2017.02
Ecuador
Ecuador
Ecuador
Ecuador
Ecuador
00
12
2017
00
12
2017
18
14
20
[
1961
]
[
2001
]
[
2005
]
[
1999
]
[
2000
]
[
2008
]
[
2010
]
[
2011
]
[
2012
]
[
2014
]
[
2016
]
[
2015
]
[
2016
]
[
2016
]
[
2008
]
[
1991
]
[
1962
]
[
1881
]
[
2005
]
[
2008
]
[
1969
]
[
1989
]
[
2015
]
[
2013
]
[
2005
]
[
2002
]
[
2002
]
[
2017
]
[
2001
]
[
2013
]