Pavel, N. H. <br/><br/>
Differential Equations, flow Invariance and Applications 
/ by N. H. Pavel 
 - Boston:  Pitman Advanced Publishing Program,  1984. 
 - 246p. 
 - Research Notes in Mathematics 113 .
<br/><br/><label>ISBN: </label>9780273086512 
<br/><br/><label>Dewey Class. No.: </label>515.355  / PAV/D