2182-4452 2182-4452 S2182-44522018000200137 10.31492/2184-2043.rilp2018.34/pp.137-147 Portugal 30 12 2018 30 12 2018 34 137 147

1 2014 6 2 2 51-60 2 2009 49 427-62 3 4 2006 5 2009 6 6 6 1778-98 6 215 7 8 9 2010 50 737-48 10 1988 66-79 11 2004