- Q P Liu, “Fully supersymmetric hierarchies from an energy-dependent super Hill operator”, J. Phys. A: Math. Gen., 30, no. 24, 1997, 8661
- Renat Zhdanov, “On relation between potential and contact symmetries of evolution equations”, Journal of Mathematical Physics, 50, no. 5, 2009, 053522
- T. Wolf, A. Brand, “Examples of the investigation of differential equations with modularized programs”, Mathematical and Computer Modelling, 25, no. 8-9, 1997, 133
- Norbert Euler, Marianna Euler, “A Tree of Linearisable Second-Order Evolution Equations by Generalised Hodograph Transformations”, JNMP, 8, no. 3, 2001, 342
- V V Sokolov, Thomas Wolf, “A symmetry test for quasilinear coupled systems”, Inverse Problems, 15, no. 2, 1999, L5
- A. G. Meshkov, “On symmetry classification of third-order evolutionary systems of divergent type”, J Math Sci, 151, no. 4, 2008, 3167