Bublikov, V. 2022. Reasons for the Change in the Ethnic Composition of Areas Densely Populated by Ukrainians in Russia in the Assessments of Modern Russian-Ukrainian Biethnors: Forced vs Natural Assimilation. Journal of Frontier Studies. 7, 3 (Sep. 2022), 63-91. DOI:https://doi.org/10.46539/jfs.v7i3.413.