1870-2147 1870-2147 S1870-21472021000200325 10.35487/rius.v15i48.2021.681 Peru 00 12 2021 00 12 2021 15 48 325 337

2007 2018 61-86 2012 159-68 2016 30 30 209-37 2017 2012 2018 2018 25-60 2017 2011 2017 2006 4 4 12-4 2013 2016 225-60 2017 2009