ANDRICA, Dorin; CĂLUGĂREANU , Grigore. Uniquely clean 2 × 2 invertible integral matrices. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 62, n. 3, p. 287–293, 2017. DOI: 10.24193/subbmath.2017.3.02. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1831. Acesso em: 10 feb. 2025.