“…Finally, we mention some existence and multiplicity results for double phase problems without Kirchhoff term, that is, m(t) ≡ 1 for all t ≥ 0. We refer to the papers of Arora-Shmarev [3,4] (parabolic double phase problems), Colasuonno-Squassina [10] (eigenvalue problems), Farkas-Winkert [18], Farkas-Fiscella-Winkert [17] (singular Finsler double phase problems), Fiscella [20] (Hardy potentials), Gasiński-Papageorgiou [26] (locally Lipschitz right-hand side), 28,29] (convection and superlinear problems), Liu-Dai [34] (Nehari manifold approach), Liu-Dai-Papageorgiou-Winkert [35] (singular problems), Perera-Squassina [43] (Morse theoretical approach), Zeng-Bai-Gasiński-Winkert [48,49] (multivalued obstacle problems) and the references therein.…”