%0 Journal Article %A A. G. Baskakov %T Harmonic analysis of cosine and exponential operator-valued functions %J Sbornik. Mathematics %D 1985 %P 63-90 %V 52 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1985_52_1_a4/ %G en %F SM_1985_52_1_a4