Some Properties of D-Operator on Hilbert Space. Iraqi Journal of Science, [S. l.], v. 61, n. 12, p. 3366–3371, 2020. DOI: 10.24996/ijs.2020.61.12.24. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2814.. Acesso em: 2 may. 2024.