References
- Edmondson, W. T. & Winberg, G. G., 1971: A manual on method for the assessment of secondary productivity in fresh waters. — IBP Handb. 17: 1358.
- Kornijów, R., 1982: New and rare species of Chironomidae (Diptera) in Poland. — Ann. Univ. M. Curie- Skiod. 37: 133–136.
- Kowalik, W., 1978: Occurrence of Hydracarina in the lakes of various trophy in the Łęczna-Włodawa Lake Distria. — Ann. Univ. M. Curie-Stłod. 33: 443–468.
- Pejler, B., 1983: Zooplanktonic indicators of trophy and their food. — Hydrobiol. 101: 11–114.
- Radwan, S., 1976: Planktonic rotifers as indicators of lake trophy. — Ann. Univ. M. Curie-Skiodowska 31: 227–235.