1. Rao, T.P. and Biju, V.M., Rev. Anal. Chem., 2002, vol. 21, no. 3, p. 23.
2. Rao, T.P. and Raju, V.M. // Crit. Rev. Anal. Chem., 2000, vol. 30, nos. 2–3, p. 179.
3. Prohaska, T., Hann, S., Latkoczy, C., and Stingeder, G., J. Anal. At. Spectrom. 1999, vol. 14, no. 9, p. 1501.
4. Saha, B.B, Bagyalakshmi, R., Periaswami, G., Kavimandan, V.D., Chitambar, S.A., Jain, H.C., and Mathews, C.K., BARC Report, 1977, vol. 891.
5. Koyama, S., Osaka, M., Sekine, T., Morozumi, K., Namekawa, T., and Itoh, M., J. Nucl. Sci. Technol., 2003, vol. 40, no. 12, p. 998.