%0 Journal Article
%A Chun-San Lee
%A Sen-Yen Shaw
%T Representation formulas for cosine and sine functions of operators.
%J Aequationes mathematicae
%D 1985
%P 162-171
%V 29
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1985__29_137090/
%F AM2_1985__29_137090