A. Chkhartishvili, D. Gubanov, V. Melnichuk, and V. Sych, “Exploratory Data Analysis and Natural Language Processing Model for Analysis and Identification of the Dynamics of COVID-19 Vaccine Opinions on Small Datasets”, Adv Syst Sci Appl, vol. 23, no. 3, pp. 108–126, Oct. 2023.