2218-3620 2218-3620 S2218-36202019000500309 Ecuador 00 10 2019 00 10 2019 11 5 309 315

1997 46-57 2002 32 93-122 2006 2006 42 85-102 2006 2002 29 17-42 2011 10 20 20 193-203 2019 2011 2003