Il’chenkoYV, Chaikovs’kyiAV. Cauchy problem for a differential equation in the Banach space with generalized strongly positive operator coefficient. Ukr. Mat. Zhurn. [Internet]. 2011Aug.25 [cited 2024Nov.24];63(8):1053-70. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2784