%0 Journal Article %A So, Wasin %T An Explicit Criterion for the Convexity of Quaternionic Numerical Range %J Canadian mathematical bulletin %D 1998 %P 105-108 %V 41 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1998-016-4/ %R 10.4153/CMB-1998-016-4 %F 10_4153_CMB_1998_016_4