Green,W. J., Canfield, D. E., and Steinly, B. A., spatial variations in and comroLs on the calciic sauirniion index in Acton Lake, Ohio, Freshxvates Biology, 1985, 15: 525-533。
[2]
Kelts K. &. Hsü K. J.,Freshwater carbonate sedimentation Lakes: Chemistry, Geology, Physics (Ed. A. Lerman), Springer, New York. 1978: 295,324.
