0120-2812 0120-2812 S0120-28122018000100046 10.15446/acag.v67n1.66572 Colombia Colombia 00 03 2018 00 03 2018 67 1 46 52

2008 48 1-18 2009 113 1 1 208-15 2015 63 45 45 9948-53 2016 15 1 1 73-91 2016 67 4 4 422-30 2017 2017 2017 228 484-90 2007 7 2 2 47-52 2001 7 2 2 377-86 R Development Core Team 2017 2012 5 1 1 7-12 2015 166 125-32 2014 7 2 2 21-34 2016 51 8 8 1877-87 2016 194 1089-94 2012 101-24 2017 1-42 2016 81 83-90 2017 77 362-9 2002 13 329-39 2006 24 87-94