@article{1077374947, author = {Newman, D. J. and Shapiro, Harold S.}, title = {Some theorems on \v Ceby\v sev approximation}, journal = {Duke Math. J.}, volume = {30}, number = {1}, year = {1963}, pages = { 673-681}, language = {en}, url = {http://dml.mathdoc.fr/item/1077374947} }
Newman, D. J.; Shapiro, Harold S. Some theorems on Čebyšev approximation. Duke Math. J., Tome 30 (1963) no. 1, pp. 673-681. http://gdmltest.u-ga.fr/item/1077374947/