Strelnikova, N.I. (1965). Rare and new species of the Late Cretaceous diatoms of the eastern slope of the Polar Ural Mountains. Novitates Systematicae Plantarum Non Vascularium (Academia Scientiarum URSS Institutum Botanicum Nomine V.L. Komarovii) (Novosti Sistematiki Nizschikh Rastenii), 1965: 29-37, tbl. 1-6