Landis, E. E. Light elements in space-time, passing through a hypersurface in configuration space. (English. Russian original) Zbl 0693.35029 Sel. Math. Sov. 8, No. 4, 341-349 (1989); translation from Tr. Semin. Vektorn. Tenzorn. Anal. Prilozh. Geom. Mekh. Fiz. 22, 60-68 (1985). MSC: 35F10 37J99 35A30 78A99 58J99 PDFBibTeX XMLCite \textit{E. E. Landis}, Sel. Math. Sov. 8, No. 4, 341--349 (1989; Zbl 0693.35029); translation from Tr. Semin. Vektorn. Tenzorn. Anal. Prilozh. Geom. Mekh. Fiz. 22, 60--68 (1985)
Mishchenko, A. S.; Fomenko, A. T. Integrability of Euler equations on semisimple Lie algebras. (English) Zbl 0517.58024 Sel. Math. Sov. 2, 207-291 (1982). MSC: 37J35 37K10 17B20 35Q05 37J99 58J99 PDFBibTeX XMLCite \textit{A. S. Mishchenko} and \textit{A. T. Fomenko}, Sel. Math. Sov. 2, 207--291 (1982; Zbl 0517.58024)