1134-8046 1134-8046 S1134-80462019000300012 10.20986/resed.2018.3647/2017 España Spain 00 06 2019 00 06 2019 26 3 206 206 2015 62 4 4 345-55 2015 62 4 4 333-7 2013 116 2 2 319-26 2012 38 12 12 1564-9 2012 40 4 4 683-9