Il’chenko, S. A., and Yu. S. Mishura. 2004. “Generalized Two-Parameter Lebesgue-Stieltjes Integrals and Their Applications to Fractional Brownian Fields”. Ukrains’kyi Matematychnyi Zhurnal 56 (4), 435–450. https://umj.imath.kiev.ua/index.php/umj/article/view/3766.