%0 Journal Article
%A Hengartner, Walter
%A Szapiel, Wojciech
%T Extremal Problems for the Classes S R -p and T R -p
%J Canadian journal of mathematics
%D 1990
%P 619-645
%V 42
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-033-x/
%R 10.4153/CJM-1990-033-x
%F 10_4153_CJM_1990_033_x