0864-2141 0864-2141 S0864-21412021000400002 Peru Peru 00 12 2021 00 12 2021 35 4 1 2021 35 1 1 2 2018 13 2 2 294-311 3 2020 2 30 30 219-32 4 2011 30 30 103-24 5 2010 12 3 3 425-33 6 2018 43 2 2 61-5