%0 Journal Article %A Lorch, Lee %T On an Extremal Problem in Fourier Series %J Canadian mathematical bulletin %D 1960 %P 188-188 %V 3 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1960-025-6/ %R 10.4153/CMB-1960-025-6 %F 10_4153_CMB_1960_025_6