Duggal Krishan L <br/><br/>
Lightlike submanifolds of semi-Riemannian manifolds and applications. 
Duggal Krishan L; Bejancu Aurel 
 -  1996 
<br/><br/><label>Standard No.: </label>18722 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B398, N6