Kozhan, E.A., Sugak, V.G. і Sugak, A.V. 2010. Geo-radar sounding of near-surface structure of soil of the National Reserve «Sofiya Kievskaya» in the territory of the Cyril’s church. Геофізичний журнал. 32, 3 (Чер 2010), 43–49. DOI:https://doi.org/10.24028/gzh.0203-3100.v32i3.2010.117531.