Овчинникова, М.Ю. and Жегалло, Е.А. 2019. Fossil microorganisms and tracks of their life in KMA boxytes. Proceedings of Voronezh State University. Series: Geology. 2 (Apr. 2019), 141-145. DOI:https://doi.org/10.17308/geology.2019.2/1803.