Bellman, R and Wing, G M <br/><br/>
An Introduction to Invariant Imbedding (e-book) 

 -  Siam  1992 
 - Classics in Applied Mathematics .
<br/><br/> http://portal.igpublish.com/iglibrary/search/SIAMB0000155.main.html?24 
<br/><br/><label>ISBN: </label>9780898713046 
<br/><br/><label>Subjects--Index Terms: </label>Invariant imbedding.