%0 Journal Article
%A E. LUKÁCS
%T Non-Negative Definite Solutions of Certain Differential and Functional Equations Reports of Meetings
%J Aequationes mathematicae
%D 1969
%P 137-143
%V 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1969__2_182320/
%F AM2_1969__2_182320