References
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- Koštíř, J., 1971: (Origin of life). (In Czech). — Vesmír 50 (6), 163–168.
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- Pringsheim, E. G., 1963: Farblose Algen. — p. 471. G. Fischer Vlg., Jena.
- Sládeček, V., 1972: Saprobic successions. — Verh. Internat. Verein. Limnol. 18, 896–902.