@article{1178242681,
author = {Sekigawa, Kouei and Takagi, Hitoshi},
title = {On conformally flat spaces satisfying a certain condition on the Ricci tensor},
journal = {Tohoku Math. J. (2)},
volume = {23},
number = {4},
year = {1971},
pages = { 1-11},
language = {en},
url = {http://dml.mathdoc.fr/item/1178242681}
}
Sekigawa, Kouei; Takagi, Hitoshi. On conformally flat spaces satisfying a certain condition on the Ricci tensor. Tohoku Math. J. (2), Tome 23 (1971) no. 4, pp. 1-11. http://gdmltest.u-ga.fr/item/1178242681/