1578-2549 1578-2549 S1578-25492018000200085 10.12961/aprl.2018.21.02.4 Spain Spain 00 06 2018 00 06 2018 21 2 85 86 1 2015 261 2 2013 1999 2 1-3 4 2011 34 419-30 5 2017 6 19/1 2/ 20 302 7 2017 91 1-15