Herasymchuk, V.H., Maslyuchenko, V.K. and Maslyuchenko, O.V. (2004) “Separately continuous functions with respect to a variable frame”, Ukrains’kyi Matematychnyi Zhurnal, 56(9), pp. 1281–1286. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3841 (Accessed: 5 December 2025).