%0 Journal Article
%A Brown, Richard C.
%A Krall, Allan M.
%T On minimizing the sum of squares of $\Cal L^2$ norms of differential operators under constraints
%J Czechoslovak Mathematical Journal
%D 1977
%P 132-143
%V 27
%N 1
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1977.101451/
%R 10.21136/CMJ.1977.101451
%G en
%F 10_21136_CMJ_1977_101451