Yurchuk, N. I., and Ababneh Mousa. “Regularization by Nonlocal Conditions of the Incorrect Problems for differential‐operator Equations of the First Order”. Mathematical Modelling and Analysis 2, no. 1 (December 15, 1997): 160-166. Accessed November 22, 2024. https://jest.vgtu.lt/index.php/MMA/article/view/10026.