1. Fluctuations in the animal populations of the littoral zone in Lake Mendota;Andrews;Transactions of the Wisconsin Academy of Sciences, Arts and Letters,1943
2. Baillargeon G. & Rainville J. (1979) Statistique appliquée. Tome 3: Régression Multiple, 2emeédition.
3. Editions SMG (Sciences-Mathematiques-Gestion), Trois-Riviéres. Québec.
4. The periphyton of the submerged macrophytes of Mikolajskie Lake;Bownik;Ekologia Polska,1970