References
- Cholnoky, B. J., 1968: Die Ökologie der Diatomeen in Binnengewässern. — J. Cramer. 699 pp.
- Czechowski, T., et al. 1957: Statistical tables (in Polish). — PWN Warszawa. 158 pp.
- Kadłubowska, J. Z., 1977: Einfache Methode zum quantitativen Vergleich von Sapro-biocoenosen. — Erg. Limnol. 9:113–116.
- Kedzierski, Z., 1975: Elements of Statistical Analysts with Representative Method in Forestry (in Polish). — PWN Warszawa.