%0 Journal Article
%A Hakl, Robert
%A Zamora, Manuel
%T Periodic Solutions of an Indefinite Singular Equation Arising from the Kepler Problemon the Sphere
%J Canadian journal of mathematics
%D 2018
%P 173-190
%V 70
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2016-050-1/
%R 10.4153/CJM-2016-050-1
%F 10_4153_CJM_2016_050_1