CHRONTSIOS-GARITSIS, E.-K.; HINKKANEN, A. A geometric property of quadrilaterals. Annales Fennici Mathematici, [S. l.], v. 49, n. 1, p. 281–302, 2024. DOI: 10.54330/afm.145026. Disponível em: https://afm.journal.fi/article/view/145026. Acesso em: 17 may. 2024.