MAGDAȘ, Adrian. Best proximity problems for Ćirić type multivalued operators satisfying a cyclic condition. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 62, n. 3, p. 395–405, 2017. DOI: 10.24193/subbmath.2017.3.11. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1848. Acesso em: 5 feb. 2025.