Karataeva, T. V. “On the Existence of the Stieltjes Integral for Functions of Bounded Variation”. Ukrains’kyi Matematychnyi Zhurnal 47, no. 3 (March 25, 1995): 432–435. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5438.