VERBITSKYI, V. V.; TAIROVA, M. S.; MULIARCHUK, V. S. Convergence of the power method for multiple eigenvalue. Journal of Numerical and Applied Mathematics, [S. l.], n. 1, p. 14–20, 2025. DOI: 10.17721/2706-9699.2025.1.02. Disponível em: https://jnam.knu.ua/index.php/jnam/article/view/199. Acesso em: 7 feb. 2026.