Nonclassical symmetry reductions and exact solutions of the Zabolotskaya–Khokhlov equation

@inproceedings{Clarkson1992NonclassicalSR,
  title={Nonclassical symmetry reductions and exact solutions of the Zabolotskaya–Khokhlov equation},
  author={Peter A. Clarkson and Simon Hood},
  year={1992}
}