Głaczyński, M., and O. Ivanytskij. “The Phenomenon of Economic Singularity As a Result of Macroeconomic Uncertainty”. Fundamental and Applied Researches in Practice of Leading Scientific Schools, Vol. 31, no. 1, Feb. 2019, pp. 61-63, doi:https://doi.org/10.33531/farplss.2019.1.12.