PetrinaD. Ya., and PetrinaК. D. “Stochastic Dynamics and Boltzmann Hierarchy. III”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 4 (April 25, 1998): 552–569. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4925.