1. Similarity, Self-Similarity, and Intermediate Asymptotics;Barenblatt,1979
2. Similarity Methods for Differential Equations;Bluman,1974
3. Symmetries and Differential Equations;Bluman,1989
4. Solution of Differential Equations by Means of One-Parameter Groups;Hill,1982
5. Transformation Groups Applied to Mathematical Physics;Ibragimov,1985