Kratz, K. O., 1963, Geology of the Karelian Karelids [in Russian]: Leningrad, Izdatel'stvo Akad. Nauk SSSR, 210 p.

Makarikhin, V. V., and Kononova, G., 1983, Phytolites of the Karelian Lower Proterozoic [in Russian]: Leningrad, Nauka, 180 p.

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