Mazurenko, Viktor, and Oles Mazurenko. “Square DA-Integrable Solutions of Differential Systems With Measures on the Semiaxis”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 18(68) (December 1, 2023): 32–48. Accessed May 17, 2024. https://pvntsh.nung.edu.ua/index.php/number/article/view/1878.