A Full-Cycle Methodology for News Topic Modeling and User Feedback Research. - Sergei Koltsov; Sergei Pashakhin; Sofia Dokuka (SocInfo (1), 2018)

How Many Clusters? An Entropic Approach to Hierarchical Cluster Analysis. - Sergei Koltcov; Vera Ignatenko; Sergei Pashakhin (SAI (3), 2020)