2178-5201 2178-5201 S2178-52012020000100103 10.4025/actascieduc.v42i1.44598 Brazil 00 00 2020 00 00 2020 42

2014 18 2 2 265-72 1978 1999 425-70 2001 1991 1 1983 1985 2006 1990 1991 1995 1998 109-25 1999 1999 201-417 2001