Myronyuk, M. V. “On the Skitovich-Darmois Theorem on Abelian Groups”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 10 (October 25, 2004): 1342 – 1356. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3847.