1982-7806 1982-7806 S1982-78062018000100051 10.14393/che-v17n1-2018-4 Brazil 00 04 2018 00 04 2018 17 1 51 70

8 2 2 47-62 2 2 51-8 10 1 e 2 1 e 2 115-32