Its, A. R.; Matveev, V. B. The algebraic-geometrical integration of the modified non-linear Schrödinger equation finite-zonal solutions and their degenerations. (Russian) Zbl 0488.35028 Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 101, 64-76 (1980). MSC: 35J10 35J60 81Q05 PDFBibTeX XMLCite \textit{A. R. Its} and \textit{V. B. Matveev}, Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 101, 64--76 (1980; Zbl 0488.35028) Full Text: EuDML
Paneitz, S. M.; Segal, I. E. Quantization of wave equations and hermitian structures in partial differential varieties. (English) Zbl 0469.35065 Proc. Natl. Acad. Sci. USA 77, 6943-6947 (1980). MSC: 35L70 35L05 81T08 81U99 14M99 PDFBibTeX XMLCite \textit{S. M. Paneitz} and \textit{I. E. Segal}, Proc. Natl. Acad. Sci. USA 77, 6943--6947 (1980; Zbl 0469.35065) Full Text: DOI
Stuart, C. A. Bifurcation for variational problems when the linearisation has no eigenvalues. (English) Zbl 0458.47048 J. Funct. Anal. 38, 169-187 (1980). MSC: 47J05 35B32 35Q99 81Q05 PDFBibTeX XMLCite \textit{C. A. Stuart}, J. Funct. Anal. 38, 169--187 (1980; Zbl 0458.47048) Full Text: DOI
Leibbrandt, George Nonlinear superposition for Liouville’s equation in three spatial dimensions. (English) Zbl 0451.35056 Lett. Math. Phys. 4, 317-321 (1980). MSC: 35Q99 81Q05 PDFBibTeX XMLCite \textit{G. Leibbrandt}, Lett. Math. Phys. 4, 317--321 (1980; Zbl 0451.35056) Full Text: DOI
Berestycki, Henri; Lions, Pierre-Louis Some applications of the method of super and subsolutions. (English) Zbl 0433.35023 Bifurcation and nonlinear eigenvalue problems, Proc., Villetaneuse/France 1978, Lect. Notes Math. 782, 16-41 (1980). MSC: 35J65 35A25 47J25 PDFBibTeX XML