1. Preparation of the sea water reference material for trace metals, NASS-1
2. Berman S. S. Mykytiuk A. P. Yeats P. A. Bewers J. M. , International Council for the Exploration of the Sea , Report CM1983/E:24 , 1983 .
3. Riley, J. P. 1975.Chemical Oceanography, Edited by: Riley, S. P. and Skirrow, G. Vol. 3, 193New York: Academic Press. 2nd ed.