Chistyakov, G., & Pergamentsev, S. (1995). Some extension of the Darmois-Skitovich and Kagan theorems to the classes of the generalized random variables. Математическая физика, анализ, геометрия, 2(3-4), 463–488. вилучено із https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m02-0463e