S. A. Il'chenko and Y. S. Mishura, “Generalized two-parameter Lebesgue-Stieltjes integrals and their applications to fractional Brownian fields”, Ukr. Mat. Zhurn., vol. 56, no. 4, pp. 435–450, Apr. 2004, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3766