Non-linear Partial Differential Operators and Quantization Procedures: Proceedings of a Workshop held at Clausthal, Federal Republic of Germany, 1981 Lecture Notes in Mathematics, nr. 1037 Editat de S. I. Andersson et al. noi 1983 Paperback Preț: 321.90 lei 6-8 săpt.
Differential Geometric Methods in Mathematical Physics: Proceedings of a Conference Held at the Technical University of Clausthal, FRG, July 23-25, 1980 Lecture Notes in Mathematics, nr. 905 Editat de H.-D. Doebner et al. apr 1982 Paperback Preț: 320.25 lei 6-8 săpt.