Mukminov, F. Kh. On straightening the characteristics of a quasilinear second-order equation. (English. Russian original) Zbl 0684.35005 Theor. Math. Phys. 75, No. 1, 340-345 (1988); translation from Teor. Mat. Fiz. 75, No. 1, 18-25 (1988). MSC: 35A22 35A30 35G20 35Q99 PDFBibTeX XMLCite \textit{F. Kh. Mukminov}, Theor. Math. Phys. 75, No. 1, 340--345 (1988; Zbl 0684.35005); translation from Teor. Mat. Fiz. 75, No. 1, 18--25 (1988) Full Text: DOI
Bogolyubov, N. N. jun.; Prikarpatskij, A. K. Quantum current Lie algebra as the universal algebraic structure of the symmetries of completely integrable nonlinear dynamical systems of theoretical and mathematical physics. (English. Russian original) Zbl 0657.35120 Theor. Math. Phys. 75, No. 1, 329-339 (1988); translation from Teor. Mat. Fiz. 75, No. 1, 3-17 (1988). MSC: 35Q99 35B40 17B65 35A30 PDFBibTeX XMLCite \textit{N. N. Bogolyubov jun.} and \textit{A. K. Prikarpatskij}, Theor. Math. Phys. 75, No. 1, 329--339 (1988; Zbl 0657.35120); translation from Teor. Mat. Fiz. 75, No. 1, 3--17 (1988) Full Text: DOI