Dmitruk, S. 2018. Chełm Orthodox Diocese as Mentioned in the Gazeta Ludowa. Tygodnik Ilustrowany Weekly from 1915 to 1918. Studia z Dziejów Rosji i Europy Środkowo-Wschodniej. 52, 2 (sty. 2018), 5–24. DOI:https://doi.org/10.12775/SDR.2017.EN2.01.