1.
Shmarda Z. Existence and uniqueness of solution of the Cauchy problem for singular systems of integro-differential equations. Ukr. Mat. Zhurn. [Internet]. 1993Dec.25 [cited 2024Nov.24];45(12):1716–1720. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5983