2631-2786 2631-2786 S2631-27862021000200081 10.35290/rcui.v8n2.2021.374 Venezuela Venezuela Venezuela 00 08 2021 00 08 2021 8 2 81 92

2006 2009 2004 1976 39-61 2006 1983 1998 2008 17-38 2000 40 40 7-36 1992 2003 2006 2011 15 319-26