Exact spatial similaritons for the generalized (2+1)-dimensional nonlinear Schrödinger equation with distributed coefficientsChao-Qing Dai, Shi-Qun Zhu, Liang-Liang Wang and Jie-Fang ZhangEPL, 92 2 (2010) 24005DOI: https://doi.org/10.1209/0295-5075/92/24005