PAPAGEORGIOU, N. S.; RĂDULESCU, V. D. Positive solutions for parametric semilinear Robin problems with indefinite and unbounded potential. MATHEMATICA SCANDINAVICA, [S. l.], v. 121, n. 2, p. 263–292, 2017. DOI: 10.7146/math.scand.a-96696. Disponível em: https://www.mscand.dk/article/view/96696. Acesso em: 20 apr. 2024.