Kazakevičius, Vytautas, and Remigijus Leipus. “On the Uniqueness of ARCH Processes”. Lietuvos matematikos rinkinys 47, no. spec. (December 20, 2007): 53–57. Accessed January 18, 2026. https://www.zurnalai.vu.lt/LMR/article/view/18181.