Slyunkova И.Н. 2020. Church Murals Based on G. G. Gagarin’s Sketches and an Appeal to the «Builders of Russian Сhurches». Church Art and Archaeology Review. 4, 3 (Oct. 2020), 130–144. DOI:https://doi.org/10.31802/BCAA.2020.4.3.009.