@article{MAN_1922__86_158952,
     author = {E. Trefftz},
     title = {Das statische {Gravitationsfeld} zweier {Massenpunkte} in der {Einsteinschen} {Theorie.}},
     journal = {Mathematische Annalen},
     pages = {317--326},
     publisher = {mathdoc},
     volume = {86},
     year = {1922},
     zbl = {48.1035.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1922__86_158952/}
}