Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1970_2_a0, author = {P. K. Belobrov}, title = {The {Chebyshev} point of a~system of hyperplanes in a~normed space}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {3--9}, publisher = {mathdoc}, number = {2}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1970_2_a0/} }
P. K. Belobrov. The Chebyshev point of a~system of hyperplanes in a~normed space. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1970), pp. 3-9. http://geodesic.mathdoc.fr/item/IVM_1970_2_a0/