Cerami G, Maniscalco C. Multiple positive solutions for a singularly perturbed Dirichlet problem in "geometrically trivial" domains. TMNA [Internet]. 2002 Mar. 1 [cited 2024 Jul. 22];19(1):63-76. Available from: https://apcz.umk.pl/TMNA/article/view/TMNA.2002.004