SERDIUK, O., O. PISKUN, V. DIKHTIARENKO, and N. BILETSKA. “PRELIMINARY DETERMINATION OF THE NUMBER OF CLUSTERS USING SOFM ARTIFICIAL NEURAL NETWORKS”. Cherkasy University Bulletin: Applied Mathematics. Informatics, no. 1, Dec. 2021, pp. 91-112, doi:10.31651/2076-5886-2021-1-91-112.