Radzievskii GV. Uniqueness of solutions of boundary-value problems for operator-differential equations on a finite segment and on a semiaxis. Ukr. Mat. Zhurn. [Internet]. 1994Mar.25 [cited 2024Jul.27];46(3):279–292. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5761