K. Martens, B. Goddeeris, G. Coulter (Archiv für Hydrobiologie – Advances in Limnology 1994, 44: 55–64) Sell, J.; Spirkovski, Z. (2004).
K. Martens, B. Goddeeris, G. Coulter (Archiv für Hydrobiologie — Advances in Limnology 1994, 44: 55-64) Sell, J.; Spirkovski, Z. (2004).