Caraffini, G. L., and D. Y. Petrina. “Solutions of the BBGKY Hierarchy for a System of Hard Spheres With Inelastic Collisions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 58, no. 3, Mar. 2006, pp. 371–380, https://umj.imath.kiev.ua/index.php/umj/article/view/3460.