SERGEJEVA, Natalija. The regions of solvability for some three point problem. Mathematical Modelling and Analysis, [S. l.], v. 18, n. 2, p. 191–203, 2013. DOI: 10.3846/13926292.2013.780189. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/4107. Acesso em: 9 may. 2025.