%0 Journal Article
%A Veikko T. Purmonen
%T On generalized a priori estimates for quasi-elliptic differential operators
%J Annales Fennici Mathematici
%D 1979
%P 227-252
%V 4
%N 2
%U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1978-79.0420/
%R 10.5186/aasfm.1978-79.0420
%G en
%F AFM_1979_4_2_a4