%0 Journal Article %A Laurent Beaudou %A César Hernández-Vélez %A Gelasio Salazar %T Making a graph crossing-critical by multiplying its edges %J The electronic journal of combinatorics %D 2013 %V 20 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/2712/ %R 10.37236/2712 %F 10_37236_2712