ANTOŅUKS, Aleksejs. Existence of a positive solution with concave and convex components for a system of boundary value problems. Nonlinear Analysis: Modelling and Control, [S. l.], v. 30, n. 2, p. 333–345, 2025. DOI: 10.15388/namc.2025.30.38969. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/38969. Acesso em: 16 jun. 2025.