%0 Journal Article %A Cockayne, E. J. %T On the Steiner Problem %J Canadian mathematical bulletin %D 1967 %P 431-450 %V 10 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1967-041-8/ %R 10.4153/CMB-1967-041-8 %F 10_4153_CMB_1967_041_8