Maslyuk, H. O., and V. A. Mikhailets. 2018. “Continuity in the Parameter for the Solutions of One-Dimensional Boundary-Value Problems for Differential Equations of Higher Orders in Slobodetsky Spaces”. Ukrains’kyi Matematychnyi Zhurnal 70 (3): 404-11. https://umj.imath.kiev.ua/index.php/umj/article/view/1564.