1. Report WHC-EP-0210;W. I. Winters,1989
2. F. W. WALKER, J. R. PARRINGTON, F. FEINER (Eds), Nuclides and Isotopes 14th ed., General Electric Company, San Jose, California, 1989.
3. NAS-NS 3051;L. J. Kirby,1961
4. I. S. BHAT, R. S. IYER, S. CHANDRAMONLI, Anal. Chem., 48 (1976) 224.
5. PNL-ALO-473;R. S. Strebin,1992