MURACH, A. A. Elliptic pseudodifferential operators in the improved scale of spaces on a closed manifold. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 6, p. 798–814, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3346. Acesso em: 6 dec. 2025.