Berhanu, Shiferaw. <br/><br/>
An introduction to involutive structures/ 
Shiferaw Berhanu, Paulo D. Cordaro, Jorge Hounie. 
 - Cambridge;  New York:  Cambridge University Press,  c2008. 
 - xii, 392 p.;  24 cm. 
 - New mathematical monographs;  6 .
<br/><br/>Includes bibliographical references (p. 381-389) and index. 
<br/><br/><label>ISBN: </label>9780521878579 0521878578 
<br/><br/><label>LCCN: </label>2008   274291 
<br/><br/><label>Nat. Bib. No.: </label>GBA783991  bnb 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vector fields.<br/>Differential equations, Partial.<br/>Bivectors.<br/>Approximation theory.
<br/><br/><label>Dewey Class. No.: </label>515.35  / B497i