%0 Journal Article %A Harlander, Jens %A Rosebrock, Stephan %T Relative vertex asphericity %J Canadian mathematical bulletin %D 2021 %P 292-305 %V 64 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000454/ %R 10.4153/S0008439520000454 %F 10_4153_S0008439520000454