Manstavičius, Eugenijus, and Robertas Petuchovas. “Distribution of the Combinatorial Multisets Component Vectors”. Lietuvos matematikos rinkinys 53, no. A (December 15, 2012): 66–71. Accessed January 21, 2026. https://www.zurnalai.vu.lt/LMR/article/view/14874.