2Foissner W. Basic light and scanning electron microscopic methods for taxonomic studies of ciliated protozoa [ J ]. Europ. Journal of Protistol, 1991, 27:313 - 330.
3Lom J, Dykova I. Protozoan parasites of fishes[ J]. Developments in aquaculture and fisheries science, 1992, Vol. 26. Elsevier, Amsterdam.
4Klein B. M. The ‘dry' silver method and its proper use [ J]. J Protozool, 1958, 5:99 - 103.
