Taarabti, S., Z. El Allali, and K. Ben Haddouch. “On $\mathcal{p}(x)$-Kirchhoff-Type Equation Involving $\mathcal{p}(x)$-Biharmonic Operator via Genus Theory”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 72, no. 6, June 2020, pp. 842-51, doi:10.37863/umzh.v72i6.6019.