@article{02121206,
title = {Semi-Riemannian manifolds whose Weyl tensor is a Kulkarni-Nomizu square.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {71(85)},
year = {2002},
pages = {95-106},
doi = {10.2298/PIM0272095G},
zbl = {1060.53025},
language = {en},
url = {http://dml.mathdoc.fr/item/02121206}
}
Głogowska, Małgorzata. Semi-Riemannian manifolds whose Weyl tensor is a Kulkarni-Nomizu square.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 71(85) (2002) pp. 95-106. doi : 10.2298/PIM0272095G. http://gdmltest.u-ga.fr/item/02121206/