@article{JDM_1943__53_146343,
     author = {Kyrille Popoff},
     title = {H. {Happel;} {Das} {Dreik\"orperproblem.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {58--59},
     publisher = {mathdoc},
     volume = {53},
     year = {1943},
     url = {http://geodesic.mathdoc.fr/item/JDM_1943__53_146343/}
}