A. G. Brusentsev, “A haracterization of closure of the set of compactly supported functions in Dirichlet generalized integral metric and its applications”, MFAT, vol. 15, no. 3, pp. 237–250, Sep. 2009, Accessed: Feb. 04, 2026. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/421