LIAN, Chunbo, GE, Bin, CAO, Qinghai and ZHANG, Yu. Infinitely many positive solutions for a double phase problems involving the double phase operator. Topological Methods in Nonlinear Analysis. Online. 21 September 2024. Vol. 64, no. 2, pp. 493 - 507. [Accessed 1 July 2025]. DOI 10.12775/TMNA.2024.013.