On the Solvability of the Operator Equation AT+T*B=C. Al-Nahrain Journal of Science, [S. l.], v. 15, n. 2, p. 156–160, 2012. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/1377.. Acesso em: 22 nov. 2024.