Lytvyn, Vasyl, Victoria Vysotska, Dmytro Uhryn, Mariya Hrendus, and Oleh Naum. 2018. “Analysis of Statistical Methods for Stable Combinations Determination of Keywords Identification”. Eastern-European Journal of Enterprise Technologies 2 (2 (92):23-37. https://doi.org/10.15587/1729-4061.2018.126009.