1. Welch, P.S.: Limnology. Mc Graw Hill, New York. (1952) 538 pp.
2. Carpenter, K. E.: Life in Inland waters. New York (1928) 267 pp.
3. Hutchinson, G. E.: A Treatise on Limnology I. Geography, Physics and Chemistry, John Wiley and Sons, New York (1957).
4. Hutchinson, G.E.: A treatise on Limnology, John Wiley and Sons, New York (1993).
5. Odum, E.P.: Fundamentals of Ecology. Philadelphia: W.B. Saunders. (1959) 546 pp.