Martini, R (ed) <br/><br/>
Geometrical approaches to differential equations  proceedings of the 4th scheveningen conference, The Netherlands, aug 26-31, 1979 
Ed by R. Martini 
 - Berlin  Springer  1980 
 - vii  339 
 - Lecture notes in mathematics 810 .
<br/><br/><label>ISBN: </label>3540100180 
<br/><br/><label>Dewey Class. No.: </label>10.01  / 22 MART