4th Scheveningen Conference,Netherlands, August 26-31, 1979 <br/><br/>
Geometrical approaches to differential equations - Proceedings   
ed. by R.Martini 
 - Berlin  Springer-Verlag  1980 
 - vii, 339p. 
 - Lecture Notes in Mathematics  810 .
<br/><br/><label>ISBN: </label>3540100180 
<br/><br/><label>Dewey Class. No.: </label>515.35  / N808