Dispersionless Davey–Stewartson system: Lie symmetry algebra, symmetry group and exact solutions Faruk Güngör and Cihangir Özemir Eur. Phys. J. Plus, 136 7 (2021) 715 Published online: 05 July 2021 DOI: 10.1140/epjp/s13360-021-01688-2