1. Altangerel, M., Norov, N., and Altangerel, D., Study of Natural Radioactivity in Coal and Its Ash Samples of Baganuur Coal Mine, Mongolia, Ulaanbaatar Conf. Nuclear Physics and Applications, 2008.
2. Lukuttsova, N.P., Kozlov, O.Yu., Krupnyi, G.I., et al., At. Energ., 2001, vol. 90, no. 4, p. 277.
3. Maslov, O.D. and Gustova, M.V., Mnogokomponentnyi instrumental’nyi gamma-aktivatsionnyi analiz pochv i drugikh ob″ektov okruzhayushchei sredy na toksichnye i soputstvuyushchie elementy: Standart predpriyatiya STP 105-2004 (Enterprise Standard STP 105-2004: Multicomponent Instrumental Gamma-Activation Analysis of Soils and Other Environmental Objects for Toxic and Associated Elements), Dubna: Ob. Inst. Yad. Issled., 2004.
4. Maslov, O.D., Gustova, M.V., and Molokanova, L.G., Mnogokomponentnyi instrumental’nyi rentgenoflyuorestsentnyi analiz pochv i drugikh ob″ektov okruzhayushchei sredy na toksichnye i soputstvuyushchie elementy: Standart predpriyatiya STP 104-2002 (Enterprise Standard STP 104-2002: Multicomponent Instrumental X-ray Fluorescence Analysis of Soils and Other Environmental Objects for Toxic and Associated Elements), Dubna: Ob. Inst. Yad. Issled., 2002.
5. Lawrence Berkely Laboratory. Table of Radioactive Isotopes: http//ie.lbl.gov/toi/perchart.htm .