TY  - BOOK
AU  - Duggal Krishan L Et Al
TI  - Null Curves and Hypersurfaces of Semi-Riemannian Manifolds
SN  - 9789812779663
PB  - World Scientific
KW  - Mathematics
UR  - https://www.worldscientific.com/worldscibooks/10.1142/6449#t=toc
ER  -