@article{10_4064_cm96_2_1,
     author = {Ryszard Deszcz and Ma{\l}gorzata G{\l}ogowska and Marian Hotlo\'s and Leopold Verstraelen},
     title = {On some generalized {Einstein} metric
 conditions on hypersurfaces
 in {semi-Riemannian} space forms},
     journal = {Colloquium Mathematicum},
     pages = {149--166},
     publisher = {mathdoc},
     volume = {96},
     number = {2},
     year = {2003},
     doi = {10.4064/cm96-2-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm96-2-1/}
}