WIŚNIEWSKI, D.; BODZIOCH, M. An integro-differential inequality related to the smallest positive eigenvalue of p(x)-Laplacian Dirichlet problem. Annales Universitatis Paedagogicae Cracoviensis Studia Mathematica, [S. l.], v. 15, p. 27–36, 2016. Disponível em: https://studmath.uken.krakow.pl/article/view/13140. Acesso em: 31 oct. 2026.