ZHANG, Xinguang; TIAN, Hui; WU, Yonghong; WIWATANAPATAPHEE, Benchawan. Existence of positive solutions for third-order semipositone boundary value problems on time scales. Nonlinear Analysis: Modelling and Control, [S. l.], v. 28, n. 1, p. 133–151, 2022. DOI: 10.15388/namc.2023.28.30229. Disponível em: https://www.zurnalai.vu.lt/nonlinear-analysis/article/view/30229. Acesso em: 17 jun. 2025.