Pommaret, J. F.,  1945- <br/><br/>
Systems of partial differential equations and Lie pseudogroups/ 
J. F. Pommaret ; with a pref. by André Lichnerowicz. 
 - New York:  Gordon & Breach,  c1978. 
 - xiv, 411 p.:  ill.;  24 cm. 
 - Mathematics and its applications ;  v. 14. .
 - Mathematics and its applications (Gordon and Breach Science Publishers),  v. 14. .
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 405-407. 
<br/><br/><label>ISBN: </label>067700270X 
<br/><br/><label>LCCN: </label>77021457 //r862 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial.<br/>Lie groups.<br/>Pseudogroups
<br/><br/><label>Dewey Class. No.: </label>515.353  / P787s