Mikhailets, V. A., A. A. Murach, and V. Soldatov. “A Criterion for Continuity in a Parameter of Solutions to Generic Boundary-Value Problems for Higher-Order Differential Systems”. Methods of Functional Analysis and Topology 22, no. 4 (December 25, 2016): 375–386. Accessed December 16, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/647.