1578-2549 1578-2549 S1578-25492018000100007 10.12961/aprl.2018.21.01.2 Spain 00 03 2018 00 03 2018 21 1 7 10 1 1998 1 5-6 2 De Montserrat i Nonó J 1998 1 1-3 3 2017 20 9-12