Zhdanov, Renat On a Lie group characterization of quasi-local symmetries of nonlinear evolution equations. (English) Zbl 1197.35260 J. Lie Theory 20, No. 2, 375-392 (2010). MSC: 35Q53 58Z05 58J70 37K10 37K30 22E60 PDFBibTeX XMLCite \textit{R. Zhdanov}, J. Lie Theory 20, No. 2, 375--392 (2010; Zbl 1197.35260) Full Text: Link
Guest, Martin A. Integrable systems, loop groups, and harmonic maps. (English) Zbl 0842.58005 Seminar on Mathematical Sciences. 22. Yokohama: Keio Univ., Dept. of Math. 121 p. (1994). Reviewer: J.S.Joel (Kelly) MSC: 58D25 58D19 58-02 58J52 22E67 81T13 58E20 PDFBibTeX XMLCite \textit{M. A. Guest}, Integrable systems, loop groups, and harmonic maps. Yokohama: Keio Univ., Dept. of Math. (1994; Zbl 0842.58005)
Jaulent, Marcel; Manna, Miguel A.; Martínez Alonso, Luis Multiseries Lie groups and asymptotic modules for characterizing and solving integrable models. (English) Zbl 0673.22009 J. Math. Phys. 30, No. 8, 1662-1673 (1989). MSC: 22E65 37C10 35Q99 37N99 37J35 37K10 35Q15 PDFBibTeX XMLCite \textit{M. Jaulent} et al., J. Math. Phys. 30, No. 8, 1662--1673 (1989; Zbl 0673.22009) Full Text: DOI Link
Martínez Alonso, Luis A new infinite-dimensional Kirillov’s structure related with nonlinear evolution equations. (English) Zbl 0488.58012 Lett. Math. Phys. 5, 99-103 (1981). MSC: 53D50 58D25 17B65 37J35 37K10 22E60 PDFBibTeX XMLCite \textit{L. Martínez Alonso}, Lett. Math. Phys. 5, 99--103 (1981; Zbl 0488.58012) Full Text: DOI