Rozhenko, N. A., and D. Z. Arov. “Realizations of Stationary Stochastic Processes: Applications of Passive System Theory”. Methods of Functional Analysis and Topology 18, no. 4 (December 25, 2012): 305–331. Accessed December 16, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/524.