N. E. Taibi, A. Dellal, J. Henderson, and A. Ouahab, “Existence of solutions for solitons type equations in several space dimensions: Derrick’s Problem with $(r,p)$-Laplacian”, MFAT, vol. 28, no. 3, pp. 274–288, Sep. 2022, doi: https://doi.org/10.31392/MFAT-npu26_3.2022.06.