@article{1103038081,
author = {Rosenblum, Marvin and Widom, Harold},
title = {Two extremal problems.},
journal = {Pacific J. Math.},
volume = {10},
number = {4},
year = {1960},
pages = { 1409-1418},
language = {en},
url = {http://dml.mathdoc.fr/item/1103038081}
}
Rosenblum, Marvin; Widom, Harold. Two extremal problems.. Pacific J. Math., Tome 10 (1960) no. 4, pp. 1409-1418. http://gdmltest.u-ga.fr/item/1103038081/