Homotopy perturbation and Adomian decomposition methods for modeling the nonplanar structures in a bi-ion ionospheric superthermal plasmaS. A. El-Tantawy, Shaukat Ali Shan, Naeem Mustafa, Mansoor H. Alshehri, Faisal Z. Duraihem and Nasser Bin TurkiEur. Phys. J. Plus, 136 5 (2021) 561DOI: https://doi.org/10.1140/epjp/s13360-021-01494-w