[1]
V. S. Il'kiv and N. I. Strap, “Solvability of the Nonlocal Boundary-Value Problem for a System of Differential-Operator Equations in the Sobolev Scale of Spaces and in a Refined Scale”,
Ukr. Mat. Zhurn., vol. 67, no. 5, pp. 611–624, May 2015, Accessed: Apr. 13, 2025. [Online]. Available:
https://umj.imath.kiev.ua/index.php/umj/article/view/2009