Summer School on Mathematical Problems of Quantum Field Theory, Primorsko, Bulgaria, Sept. 1980 <br/><br/>
Twister geometry and non-linear systems  ; review lectures given at the 4th Bulgarian summer school / 

 - Berlin:  Springer-Verlag,  1982 
 - iv, 216p. 
 - Lecture notes in Mathematics  970 .
<br/><br/><label>Dewey Class. No.: </label>530.1  / Su955.TG