Introduction: The ‘Transitional Period’: Hrushevsky’s Interpretation of the Lithuanian-Polish Era in Ukrainian History / Myron M. Kapral; Translated from the Ukrainian by Uliana M. Pasicznyk // Hrushevsky, Mykhailo. History of Ukraine-Rus': vols. 1–10 (in 12 books) / M. Hrushevsky: Canadian Institute of Ukrainian Studies Press. – 2012. – Vol. 6: Economic, Cultural, and National Life in the Fourteenth to Seventeenth Centuries. – C. xxvii.