0211-5735 0211-5735 S0211-57352018000200017 10.4321/s0211-57352018000200017 España 00 12 2018 00 12 2018 38 134 640 644 1 2000 2 2014 3 1974 4 1994 5 2017 6 1975 7 1989 8 1978 9 1991 10 2014 11 2010 12 2013 13 1955