1. Geometric Sturmian Theory of Nonlinear Parabolic Equations and Applications;Galaktionov,2004
2. Symmetries and Differential Equations;Bluman,1989
3. Applications of Lie Groups to Differential Equations;Olver,1993
4. Transformation Groups Applied to Mathematical Physics;Ibragimov,1985
5. Group Analysis of Differential Equations;Ovsiannikov,1982