0034-7744 0034-7744 S0034-77442020000401211 10.15517/rbt.v68i4.41553 Venezuela Venezuela Venezuela Venezuela 00 12 2020 00 12 2020 68 4 1211 1220

2005 15 325-47 1990 17-28 2004 1 399-447 2002 154 55-76 1992 49 6 6 1228-35 2005 2002 64 367-77 2002 100 674-82 2000 8 4 4 299-344 2015 17 438-58 1965 29 265-89 2006 2010 67 5 5 931-9 2004 97-132 2012 2 423-51 2012 2 487-504 2008 23 4 4 202-10 1990 1-16 2017 37 5 5 1176-80 2006 312 1806-9 2003 101 75-88 2017 2019 45 4 4 181-8 2007 315 1846-50 1995 93 116-26 R Development Core Team 2016 2005 7 1 1 89-101 2013 8 10 10 1-19 2005 127-47 1963 2 245-51 2015 4 264-77 2019 27 2 2 33-55 2010 62 446-9 1938 10 181-213 2008 54 107-70 1990 1 191-204