Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1924__91_159049, author = {H.W. Brinkmann}, title = {Riemann spaces conformal to {Einstein} spaces}, journal = {Mathematische Annalen}, pages = {269--278}, publisher = {mathdoc}, volume = {91}, year = {1924}, zbl = {50.0504.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1924__91_159049/} }
H.W. Brinkmann. Riemann spaces conformal to Einstein spaces. Mathematische Annalen, Tome 91 (1924), pp. 269-278. http://geodesic.mathdoc.fr/item/MAN_1924__91_159049/