Herasymchuk, V. H., V. K. Maslyuchenko, and O. V. Maslyuchenko. “Separately Continuous Functions With Respect to a Variable Frame”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 9 (September 25, 2004): 1281-1286. Accessed April 30, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3841.