@article{GDZPPN002268558, title = {The solar gravitational field completely determined by its light rays}, journal = {Mathematische Annalen}, volume = {86}, year = {1922}, pages = {227-236}, zbl = {48.1039.05}, url = {http://dml.mathdoc.fr/item/GDZPPN002268558} }
Kasner.E. The solar gravitational field completely determined by its light rays. Mathematische Annalen, Tome 86 (1922) pp. 227-236. http://gdmltest.u-ga.fr/item/GDZPPN002268558/