@article{GDZPPN002270390,
title = {Einstein spaces which are mapped conformally on each other},
journal = {Mathematische Annalen},
volume = {93},
year = {1925},
pages = {119-145},
zbl = {51.0568.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002270390}
}
Brinkmann, H.W. Einstein spaces which are mapped conformally on each other. Mathematische Annalen, Tome 93 (1925) pp. 119-145. http://gdmltest.u-ga.fr/item/GDZPPN002270390/