Differential geometrical methods in mathematical physics  :   Proceedings of the Symposium held at the University of Bonn, July 1-4, 1975. /  

 - berlin :  Springer-Verlag  1977. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>FISICA MATEMATICA--CONGRESOS.<br/>GEOMETRIA DIFERENCIAL--CONGRESOS.