%0 Journal Article
%A Werner C. Rheinboldt
%T On a General Estimation Principle and a Theory of Comparison Factors.
%J Mathematische Zeitschrift
%D 1966
%P 396-414
%V 94
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1966__94_170636/
%F MZ_1966__94_170636