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AIZICOVICI, Sergiu, PAPAGEORGIOU, Nikolaos S. and STAICU, Vasile. Positive solutions for parametric Dirichlet problems with indefinite potential and superdiffusive reaction. Topological Methods in Nonlinear Analysis. Online. 1 June 2016. Vol. 47, no. 2, pp. 423 - 438. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2016.014.