1. On construction of recursion operators from Lax representation
2. E. V. Ferepantov, “Hydrodynamic-type systems,” inCRC Handbook of Lie Group Analysis of Differential Equations, edited by N. H. Ibragimov (CRC, New York, 1994), Vol. 1, pp. 303–331.
3. Preliminary version of this work was first reported in M. Gürses and K. Zhelthukin, “On construction of recursion operators for some equations of hydrodynamic type,” inInternational Conference on Complex Analysis, Differential Equations and Related Topics, 29 May–3 June 2000, Ufa, Russia.