1990-8644 1990-8644 S1990-86442020000200138 Ecuador 00 06 2020 00 06 2020 16 73 138 142

2015 67 1 1 1-48 2015 9 2 2 56-71 2002 16 321-57 2016 44 1-6 2008 25 1 1 1-18 2001 20 5 5 475-84 R Core Team, D. C 2018 2016 44 1 1 7-14 2018 1-15 2015 196 226-32