MalyshevD. V., and MalyshevP. V. “On Locally Perturbed Equilibrium Distribution Functions”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 6 (June 25, 2004): 774–781. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3797.