Complex physical phenomena of a generalized (3+1)-dimensional Yu-Toda-Sasa-Fukuyama equation in a two-layer heterogeneous liquidM. Tantawy and H. I. Abdel-GawadEur. Phys. J. Plus, 137 9 (2022) 1001DOI: https://doi.org/10.1140/epjp/s13360-022-03199-0