Huseyn, A. et al. 2023. The impact of digitalization on the income of authors of educational products: Analysis of the influence of factors based on fuzzy logic. Journal of Eastern European and Central Asian Research (JEECAR). 10, 7 (Dec. 2023), 1048–1062. DOI:https://doi.org/10.15549/jeecar.v10i7.1371.