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

by Reetz, Axel 1937-, Reetz, Axel 1937-, Beuler, Konrad
Published 1964

Differential geometrical methods in mathematical physics II : proceedings, University of Bonn, July 13-16, 1977 /

by Bleuler, Konrad, Bleuler, Konrad
Published 1964