US6254800-B1  B. H. McConnaughey, Introduction to marine biology, 10, (1970), The C. V. Mosby Co., St Louis.;  C. J. Sindermann, D. V. Lightner ed., Developments in North American Marine aquaculture, Elsevier, Amsterdam, (1988).;  Chi Changrok, Specific minerals for cancer, Gendai Shorin, Tokyo, Japan (1991).;  David Freifelder (Translated by M. Kawakita into Japanese), Introduction to molecular biology, pp2, (1985) Tokyo Kagaku Dojin, Tokyo.;  E. Epstein, Mineral nutrition of plants: Principles and perspectives, pp292-322, (1972), John Willy and Sons, Inc., New York.;  E. Idaka et al., Application of aerated bio shelf purification to ponds and lakes, Research Report of Center for Cooperative Research, Gifu University, (2), pp62-69, (1992).;  E. Idaka et al., Biotechnical purification of rivers and lakes, Proceedings of Multi-nature type-river environment creation Symposium, pp18-31, (1992), organized by River front Arrangement Center, Dam Source Environment Arrangement Center, Gifu University, Gifu Prefecture Government (Gifu).;  E. Idaka et al., Degradation of azo compounds by Aeromonus hydrophila var. 24B, J. Soc. Dyers Colour., vol. 94, pp91-94, (1978).;  E. Idaka et al., Structure of zebrinin, a novel acylated anthocyanin isolated from Zebrina pendula, Tetrahedron Lett., vol. 28 (17), pp1901-1904 (1987).;  Ed. by F. E. Brear, Chemistry of the soil, (1969), Van Nostrand Reinhold Co., New York.;  Ed. by M. Watanabe, K. Harada, H. Fujiki, Water-bloom, Appearance and Toxicity, Tokyo University Shuppankai, Tokyo, Japan (1994).;  Ed. by Soc. Civil Engineering, Sanitary Engineering Commity, Research Methods for Environmental Sanitary Engineering, Gihodo Shuppan, Tokyo, Japan (1993).;  I. Horiuchi, E. Idaka et al., Water Treatment Method in Prawn Culture Ponds through Modern Technology, (Thailand-Japan Bilateral Seminar on Water Treatment Method in Prawn Culture Ponds through Modern Technology, Sep. 30, 1992. Eastern Hotel, Chantabuli, Thailand, Organized by Ministry of Agriculture and Cooperatives, Bank of Ayudhaya).;  I.Horiuchi, E. Idaka, S. Komura, Advanced biotechnical treatment of water in intensive prawn culture system, 19th Congress on Science and Technology of Thailand, pp89-90, (Oct., 27-29, 1993, Dusit J. B. Hotel, Hat Yai, Songkhla, Thailand).;  R. Sudo, Biology of Wastewater Treatment, pp311, Sangyo Yosui Chosakai, Tokyo, Japan (1977).;  T. Saegusa, Nematode, Nobunkyo, Tokyo, Japan (1993).;  Thomas D. Brock, Biology of microorganisms, (1970), Prentice-Hall, Inc., New Jersey.