1. Nazarenko, I.I. and Ermakov, A.N., Analiticheskaya khimiya selena i tellura (Analytical Chemistry of Selenium and Tellurium), Moscow: Nauka, 1971.
2. Dedkov, Yu.M. and Musatov, A.V., Available from VINITI, 2002, no. 1688.
3. Barcza, L., Microkhim. Acta, 1964, no. 1, p. 136.
4. Kasterka, A., Anal. Chem., 1979, vol. 24, no. 2, p. 329.
5. Bellamy, L.T., The Infra-Red Spectra of Complex Molecules, London: Methuen, 1954.