%0 Journal Article %A Tranter, C. J. %T An improved method for dual trigonometrical series %J Glasgow mathematical journal %D 1964 %P 136-140 %V 6 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034900/ %R 10.1017/S2040618500034900 %F 10_1017_S2040618500034900