2477-9199 2477-9199 S2477-91992018000200024 10.26807/cav.v0i06.170 Venezuela 00 12 2018 00 12 2018 6 24 29

2005 2010 1997 2013 2005 2002 2002 35 433-8 2011 1969 VIII 49-55 2002 1990 55 105-43 1970 10-4