1981-2582 1981-2582 S1981-25822016000200249 10.15448/1981-2582.2016.2.21946 USA USA 00 08 2016 00 08 2016 39 2 249 260

15 2 2 23-33 80 2 2 635-52 48 48 36-6 3 3 3 1-12 38 5 5 635-53 19 2 2 107-21 13 1-2 1-2 5-41 2 4 4 88-100 10 1 1 7-22