1. B. R. HARVEY, R. D. IBBETT, M. B. LOVETT, K. J. WILLIAMS, Analytical Procedure for the Determination of Strontium Radionuclides in Environmental Materials, in: Aquatic Environment Protection: Analytical Methods Number 5, by Ministry of Agricultural Fisheries and Food, Directorate of Fisheries Research, Lowestoft, UK, 1989.
2. K. H. HELLMUTH, Rapid Determination of Strontium-89 and Strontium-90, Experiences and Results with Various Methods after Chernobyl Accident in 1986, STUKA70, Helsinki, Finland, 1987.
3. A. YAMATO, J. Radioanal. Chem., 75 (1982) 265.
4. F. SCHONHOFER, E. HENRICH, J. Radioanal. Nucl. Chem., 115 (1987) 317.
5. W. J. McDOWELL, D. T. FARRAR, M. R. BILLINGS, Talanta, 21 (1974) 1231.