Infinitely many conservation laws and Darboux-dressing transformation for the three-coupled fourth-order nonlinear Schrödinger equationsMinjie Dong, Lixin Tian and Jingdong WeiEur. Phys. J. Plus, 137 1 (2022) 168DOI: https://doi.org/10.1140/epjp/s13360-021-02200-6