1517-9702 1517-9702 S1517-97022018000100131 10.1590/s1678-4634201844104011 Brasil 00 00 2018 00 00 2018 44 1995 2 107-231 2009 1974 1982 1975 2015 1997 11 31 31 137-87 1965 2009 121-52 2002 3. ed