Rybakowski, K. P. <br/><br/>
The Homotopy Index and Partial Differential Equations  
/ by K. P. Rybakowski 
 - New York:  Springer-Verlag,  1987. 
 - xii, 208p. 
<br/><br/><label>ISBN: </label>3540180672 
<br/><br/><label>Dewey Class. No.: </label>515.353  / RYB/T