Amirov, R.K. and Yurko, V.A. (2001) “On differential operators with singularity and conditions of discontinuity inside an interval”, Ukrains’kyi Matematychnyi Zhurnal, 53(11), pp. 1443–1457. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4364 (Accessed: 10 April 2025).