1. E. Amlacher, D. A. Conroy, and R. L. Herman (1961 )Textbook of Fish Diseases. English translation by, 1961 . Tropical Fish Hobbyist Publications, Neptune City, New Jersey, USA.
2. O.N. Bauer, V.A. Musselius, and Yu. A. Strelkov(1969 )Diseases of Pond Fishes. Translation No. TT72-50070, National Technical Information Service, US Department of Commerce, Springfield, Virginia, USA.
3. E. Kiernik(1909 )Chilodon hexastichusnov. sp., ein auf Susswasserfischen parasitierendes Infusorium, nebst Bemerkungen, uber Vakuolenhautbildung und Zellteilung .Bulletin International Academie Science Cracovie Cl Science, Mathematiks et Nature, pp.75 -119 .
4. The “Dry” Silver Method and Its Proper Use