ORZAN, Alexandru; POPOVICI, Nicolae. Convexity-preserving properties of set-valued ratios of affine functions. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 66, n. 3, p. 591–602, 2021. DOI: 10.24193/subbmath.2021.3.14. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1375. Acesso em: 5 feb. 2025.