Baranetskij Y, Kalenyuk P, Kolyasa L, Kopach M. The nonlocal problem for the differential-operator equation of the even order with the involution. Carpathian Math. Publ. [Internet]. 2018 Jan. 2 [cited 2024 Apr. 26];9(2):109-1. Available from: https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1454