Gennadii V. Demidenko; Stanislav V. Upsenskii <br/><br/>
Partial Differential Equations And Systems Not Solvable With Respect To The Highest-Order Derivative 

 -  Taylor and Francis  2003 
<br/><br/><label>ISBN: </label>9780429213625 
<br/><br/><label>Source: </label>EBOOK