%0 Journal Article
%A J.R. Dorroh
%T Semigroups of operators and second-order Cauchy problems.
%J Semigroup forum
%D 1985
%P 297-304
%V 31
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1985__31_134755/
%F SF_1985__31_134755