2011-804X 2011-804X S2011-804X2020000100072 10.17227/ppo.num23-11030 Colombia 00 06 2020 00 06 2020 23 72 89

2016 2011 1-28 2017 50 238-55 2014 30 30 192-7 2013 22 22 113-40 2016 2015 42 42 256-8 2012 Madrid, España 2015 10 10 44-61 2012 29 29 2010 26 26 116-24 2015 22 22 33-43 2004 23 23 57-60 2016 19 19 167-99 2006 10 10 2012 1961 XLVI 133 133 28-30 2015 2005 1-37 2015 5 4 4 46-52 2004 2001 2 2 1-40