1.
Il’kiv V. The smoothness of solutions of the problems with nonlocal multi-point conditions for strictly hyperbolic equations. Carpathian Math. Publ. [Internet]. 2009 Jun. 30 [cited 2024 Apr. 27];1(1):47-58. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/4003