1. V.V. Dobrovol'skii,The Geography of Trace Elements. Global Distribution [in Russian], Mysl', Moscow (1983).
2. Spectrometric Methods for Determining Traces of the Elements [Russian translation], Mir, Moscow (1979).
3. A.N. Ovchinnikov,Applied Geochemistry [in Russian], Nedra, Moscow (1990).
4. Instruction No. 155KhS VIMS, Moscow (1978).
5. R. A. Kulmatov, I. I. Karimov, and A. A. Kist, “Neutron-activation estimate of elemental composition of city aerosols,”Zh. Anal. Khim., No. 11, 2160–2165 (1981).