1982-7806 1982-7806 S1982-78062017000100258 10.14393/che-V16n1-2017-16 Portugal Portugal 00 04 2017 00 04 2017 16 1 258 285

56 77-85 16 2 2 245-76 5 3 3 105-27 4 8 8 149-70 14