کتاب های Krishan L. Duggal
![Differential Geometry of Lightlike Submanifolds](http://cdn.ketabkoo.com/covers/7/732911-n.jpg)
Differential Geometry of Lightlike Submanifolds
Krishan L. Duggal, 2010![Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications](http://cdn.ketabkoo.com/covers/7/732918-n.jpg)
Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications
Krishan L. Duggal, 1996![Recent Advances in Riemannian and Lorentzian Geometries](http://cdn.ketabkoo.com/covers/7/732920-n.jpg)
Recent Advances in Riemannian and Lorentzian Geometries
Krishan L. Duggal, 2003![Symmetries of Spacetimes and Riemannian Manifolds](http://cdn.ketabkoo.com/covers/7/732922-n.jpg)
Symmetries of Spacetimes and Riemannian Manifolds
Krishan L. Duggal, 1999![Null curves and hypersurfaces of semi-Riemannian manifolds](http://cdn.ketabkoo.com/covers/11/1148285-n.jpg)