@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/