Petters, Arlie O., <br/><br/>
Singularity Theory and Gravitational Lensing : 

 -  Springer Science & Business Media,  2001. 
 - 648 pages 
<br/><br/><label>ISBN: </label>9780817636685 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.
<br/><br/><label>Dewey Class. No.: </label>522.6  / PET