@article{1103038880, author = {Curtis, Philip C.}, title = {$n$-parameter families and best approximation.}, journal = {Pacific J. Math.}, volume = {9}, number = {4}, year = {1959}, pages = { 1013-1027}, language = {en}, url = {http://dml.mathdoc.fr/item/1103038880} }
Curtis, Philip C. $n$-parameter families and best approximation.. Pacific J. Math., Tome 9 (1959) no. 4, pp. 1013-1027. http://gdmltest.u-ga.fr/item/1103038880/