In nonlinear optics, fluid dynamics and plasma physics: symbolic computation on a (2+1)-dimensional extended Calogero–Bogoyavlenskii–Schiff systemYuan Shen, Bo Tian and Tian-Yu ZhouEur. Phys. J. Plus, 136 5 (2021) 572DOI: https://doi.org/10.1140/epjp/s13360-021-01323-0