0122-9893 0122-9893 S0122-98932019000200321 10.18601/01229893.n43.12 Argentina 00 08 2019 00 08 2019 43 321 350

2005 XII 2 2 203-32 1989 2017 92 92 105-33 2018 17 1 1 182-99 raci a 1994 2017 2007 1-45 2008 México 1998 8 5-34 2002 2006 2 2 1-42 2001 Estados Unidos 2014 2014 2014 2015 2014 2010 Quito 2008