Volkova, N.A. and Golub, I.N.,
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Novye akritarkhi Verkhnego Kembriya Leningradskoy Oblasti (Ladozhskaya Svita).
Paleontologicheskii Zhurnal, v.19, no.4, p.90-98, pl.7-8. (Published English translation dated 1986 in Paleontological Journal, Scripta Technica Inc. v.19, no.4, p.99-109, pl.7-8.)