0034-7744 0034-7744 S0034-77442018000301018 10.15517/rbt.v66i3.30670 Mexico Mexico Mexico 00 09 2018 00 09 2018 66 3 1018 1033

1993 109 337-49 Anonymous 1985 2006 11 9-19 2005 140 175-86 2003 217 223-33 1971 7 54-7 1979 3 133-52 1988 1999 1986 28 161-70 2010 27 931-8 2014 746 291-901 1999 175 103-10 2001 849-913 2002 9 285-91 2006 20 1730-9 1996 250-71 2009 52 1209-16 1994 1983 68 297-315 1966 48 1-86 2002 72 95-112 1991 1994 79-100 1989 77 135-43 1993 1986 88 69-74 1997 2001 59 884-901 1987 146 97-167 1987 147 245-55 2006 446-523 2006 12 89-96 2008 38 748-63 2002 12 33-142 1991 25 177-9 2004 20 417-21 1987 17-30 2000 16 273-5 2010 19 63-78 2009 40 1594-604 2004 82 1380-9 R development Core Team 2014 2003 13 145-78 2003 510 207-16 2003 32 252-7 1984 1988 76 206-14 2002 1990 42 10-7 2007 268 98-105 1999 6 281-8 1980