H. Masliuk and V. Soldatov, “One-dimensional parameter-dependent boundary-value problems in Hölder spaces”, MFAT, vol. 24, no. 2, pp. 143–151, Jun. 2018, Accessed: Dec. 13, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/691