K. D. · K. Duggal · Krishan L. Duggal
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Differential Geometry of Lightlike Submanifolds | 978-3-0346-0250-1 (3-0346-0250-2) | 2010 | Bayram Sahin | |
| Lightlike Submanifolds of Semi-Riemannian Manifolds and Applications | 978-0-7923-3957-1 (0-7923-3957-6) | 1996 | Aurel Bejancu | |
| Symmetries of Spacetimes and Riemannian Manifolds | 978-0-7923-5793-3 (0-7923-5793-0) | 1999 | Ramesh Sharma |