0213-9111 0213-9111 S0213-91112017000300280 10.1016/j.gaceta.2016.06.012 Peru 00 06 2017 00 06 2017 31 3 280 281 1 2006 95 ^s450 ^s450 450 5-101 2 2012 30 407-29 3 2010 4 1980 11 131-52 5 2005 44 11-4 6 2010 81 123-8 7 1984 10 317-30