LUCA, Rodica. Existence of positive solutions for a semipositone discrete boundary value problem. Nonlinear Analysis: Modelling and Control, [S. l.], v. 24, n. 4, p. 658–678, 2019. DOI: 10.15388/NA.2019.4.10. Disponível em: https://www.journals.vu.lt/nonlinear-analysis/article/view/12967.. Acesso em: 29 apr. 2024.