@misc{10_4153_CMB_1974_058_3,
     title = {Numerical {Range} and {Convex} {Sets*}},
     journal = {Canadian mathematical bulletin},
     pages = {295--296},
     year = {1974},
     volume = {17},
     number = {2},
     doi = {10.4153/CMB-1974-058-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-058-3/}
}