Manstavičius, Eugenijus, and Robertas Petuchovas. “Distribution of the Combinatorial Multisets Component Vectors”. Lietuvos matematikos rinkinys 53, no. A (December 15, 2012): 66–71. Accessed October 27, 2025. https://test.zurnalai.vu.lt/LMR/article/view/14874.