TY  - BOOK
AU  - Duggal, Krishan L.
AU  - Aurel, Bejancu.
TI  - Lightlike submanifolds of semi-riemannian manifolds and applications
T2  - Mathematics and its applications
SN  - 0792339576
U1  - 516.362 
PY  - 1996///
CY  - Dordrecht
PB  - Kluwer Academic Pub.
ER  -