Lump and lump strip solutions to the (3 + 1)-dimensional generalized Kadomtsev-Petviashvili equation Xue Guan, Qin Zhou and Wenjun Liu Eur. Phys. J. Plus, 134 7 (2019) 371 Published online: 31 July 2019 DOI: 10.1140/epjp/i2019-12719-6