1 G. D. Ludden, "Submanifolds of cosympletic manifolds" 4 : 237-244, 1970
2 Z. Szabo, "Structure theorems on Riemannian spaces satisfying R(X; Y ):R = 0" 17 : 531-582, 1982
3 J. Deprez, "Semi-parallel surfaces in Euclidean space" 25 : 192-200, 1985
4 F. Defever, "Ricci-semisymmetric hypersurfaces" 5 : 81-91, 2000
5 F. Defever, "P. J. Ryan's problem in semi-riemannian space forms" 41 : 271-281, 1999
6 R. Gunes, "On lightlike hypersurfaces of a semi-Riemannian space form" 27 : 283-297, 2003
7 K. Nomizu, "On hypersurfaces satisfying a certain condition on the curvature tensor" 20 : 46-59, 1986
8 A. Bejancu, "Null hypersurfaces of semi-Euclidean spaces" 14 : 25-40, 1996
9 B. Sahin, "Lightlike hypersurfaces of semi-Euclidean spaces satisfying curvature con- ditions of semi-symmetry type" 31 : 139-162, 2007
10 K. L. Duggal, "Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications" Kluwer Acad. Publishers 1996
1 G. D. Ludden, "Submanifolds of cosympletic manifolds" 4 : 237-244, 1970
2 Z. Szabo, "Structure theorems on Riemannian spaces satisfying R(X; Y ):R = 0" 17 : 531-582, 1982
3 J. Deprez, "Semi-parallel surfaces in Euclidean space" 25 : 192-200, 1985
4 F. Defever, "Ricci-semisymmetric hypersurfaces" 5 : 81-91, 2000
5 F. Defever, "P. J. Ryan's problem in semi-riemannian space forms" 41 : 271-281, 1999
6 R. Gunes, "On lightlike hypersurfaces of a semi-Riemannian space form" 27 : 283-297, 2003
7 K. Nomizu, "On hypersurfaces satisfying a certain condition on the curvature tensor" 20 : 46-59, 1986
8 A. Bejancu, "Null hypersurfaces of semi-Euclidean spaces" 14 : 25-40, 1996
9 B. Sahin, "Lightlike hypersurfaces of semi-Euclidean spaces satisfying curvature con- ditions of semi-symmetry type" 31 : 139-162, 2007
10 K. L. Duggal, "Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications" Kluwer Acad. Publishers 1996
11 P. J. Ryan, "Hypersurfaces with parallel Ricci tensor" 8 : 251-259, 1971
12 S. Tanno, "Hypersurfaces satisfying a certain condition on the Ricci tensor" 21 : 297-303, 1969
13 Y. Matsuyama, "Complete hypersurfaces with R:S = 0 in En+1" 88 : 119-123, 1983
14 P. J. Ryan, "A class of complex hypersurfaces" 26 : 175-182, 1972
15 B. E., Abdalla, "A Ricci semi-symmetric hypersurface of Euclidean space which is not semi-symmetric" 130 : 1805-1808, 2002