Е. Ю. Иванова, “Bulgarian Constructions with the Apprehensive Particle da ne bi in the Bulgarian National Corpus”, in Slavic Languages Today: Categories, Structures and Processes, J. L. Banasiak, A. Kiklewicz, and J. Mazurkiewicz-Sułkowska, Eds. Poland: Lodz University Press, 2021, pp. 139–157. doi: 10.18778/8220-635-7.10.