%0 Journal Article
%A Everitt, William Norrie
%A Giertz, Magnus
%T On the limit-3 classification of the square of a second-order, linear differential expression
%J Czechoslovak Mathematical Journal
%D 1976
%P 653-665
%V 26
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101437/
%R 10.21136/CMJ.1976.101437
%G en
%F 10_21136_CMJ_1976_101437