0124-7913 0124-7913 S0124-79132021000200143 10.15446/bitacora.v31n2.89786 Mexico 00 08 2021 00 08 2021 31 2 143 156

1998 2013 118-68 1988 2009 33 33 43-63 1994 2010 2014 13-40 2003 13 26 26 87-102 2013 23 46 46 27-38 2015 1993 112 112 1-9 2019 2015 1989 1984 46 4 4 85-102 1988 2014 253-75 1998 2018 2-15 2015 21 21 221-53 SISTEMA DE TRANSPORTE COLECTIVO METRO 2019