Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{DCG_1989__4_6_131099, author = {N. Megiddo}, title = {On the {Ball} {Spanned} by {Balls.}}, journal = {Discrete & computational geometry}, pages = {605--610}, publisher = {mathdoc}, volume = {4}, number = {6}, year = {1989}, zbl = {0688.90020}, url = {http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131099/} }
N. Megiddo. On the Ball Spanned by Balls.. Discrete & computational geometry, Tome 4 (1989) no. 6, pp. 605-610. http://geodesic.mathdoc.fr/item/DCG_1989__4_6_131099/