@article{10_4153_CJM_2012_039_9,
     author = {Hu, Shengda},
     title = {Regularization of the {Kepler} {Problem} on the {Three-sphere}},
     journal = {Canadian journal of mathematics},
     pages = {760--782},
     year = {2014},
     volume = {66},
     number = {4},
     doi = {10.4153/CJM-2012-039-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2012-039-9/}
}