2238-2097 2238-2097 S2238-20972015000200455 10.2015/repub-v24n56maio.ago010 Brazil Brazil Brazil 00 08 2015 00 08 2015 24 56 455 469

44 293-318 6 2 2 33-52 39 39 7-23 12 3 3 1530-555 42 147 147 716-37 38 395-416 42 2 2 101-18