[1]
A. A. Murach, “Elliptic pseudodifferential operators in the improved scale of spaces on a closed manifold”, Ukr. Mat. Zhurn., vol. 59, no. 6, pp. 798–814, Jun. 2007, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3346