%0 Journal Article
%A Ryshkov, S. S.
%A Erdahl, R. M.
%T The Empty Sphere Part II
%J Canadian journal of mathematics
%D 1988
%P 1058-1073
%V 40
%N 5
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1988-043-5/
%R 10.4153/CJM-1988-043-5
%F 10_4153_CJM_1988_043_5