V. B. Vasylyk and V. L. Makarov, “Exponentially Convergent Method for the First-Order Differential Equation in a Banach Space with Integral Nonlocal Condition”, Ukr. Mat. Zhurn., vol. 66, no. 8, pp. 1029–1040, Aug. 2014, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2197