2631-2786 2631-2786 S2631-27862018000200051 10.35290/rcui.v5n2.2018.90 Ecuador 00 08 2018 00 08 2018 5 2 51 59

2017 2008 1994 2000 2010 2010 34 34 1-30 2010 11-8 1998 2005 U. d. Antioquia 2008 XXVI 2 2 136-42 2006 27- 44 2016 2003