MAMIJ, K. S. On limitations of solutions of a linear uniform second-order equation in Gilbert space. Lithuanian Mathematical Journal, [S. l.], v. 5, n. 4, p. 593–604, 1965. DOI: 10.15388/LMJ.1965.19622. Disponível em: https://journals.vu.lt./LMJ/article/view/19622. Acesso em: 26 apr. 2025.