%0 Journal Article %A Maria Rita Casali %A Paola Cristofori %T Cataloguing PL 4-manifolds by gem-complexity %J The electronic journal of combinatorics %D 2015 %V 22 %N 4 %U http://geodesic.mathdoc.fr/articles/10.37236/4749/ %R 10.37236/4749 %F 10_37236_4749