1676-2592 1676-2592 S1676-25922015000300614 10.20396/etd.v17i3.8638257 Brazil Brazil 00 12 2015 00 12 2015 17 3 614 632

189 189 25 89 89 1127-144 23 2 2 279-301 23 1/2 1/2 49-69