“The Epistolary of D. I. Yavornitsky As a Reflection of Development of the Ukrainian Language in Katerinoslav Region”. Philological Studies: Scientific Bulletin of Kryvyi Rih State Pedagogical University, vol. 9, no. 2, Dec. 2013, pp. 289-97, https://doi.org/10.31812/filstd.v9i2.483.