1. Ando K., Oishi H., Hirano S., Okutomi T., Suzuki K., Okazaki H., Sawada M., Sagawa T.: Tetranactin, a new miticidal antibiotic. I. Isolation, characterization and properties to tetranactin.J. Antibiot. 24, 347–352 (1971).
2. Blažej A., Tölgyessy J., Hal'ama D., Bátora V., Rosival L., Rak J.:Chemical Aspects of the Environment. (In Slovak) Alfa, Bratislava 1981.
3. Chandler J.A.: X-ray microanalysis in the electron microscopy, in A.M. Glauert (Ed.):Practical Methods in Electron Microscopy, Vol. 5, Part II North-Holland Publ. Co., Amsterdam 1977.
4. Chirans D.D.:Environmental Science. Action for a Sustainable Future. The Benjamin/Cummings Publ. Co., Redwood City 1991.
5. Cibulka J. (Ed):Movement of Lead, Cadmium and Mercury in the Biosphere. (In Czech) Academia, Prague 1991.