GACHAGO, J.; OKELO, B.; KANGOGO, W. On Spectral Properties of Orthogonal Isometries. International Journal of Open Problems in Computer Science and Mathematics, [S. l.], v. 18, n. 4, p. 12–30, 2025. Disponível em: https://ijopcm.icsrs.uk/index.php/journal/article/view/37. Acesso em: 20 jun. 2026.