[1. Turner, J.E. (2007). Atoms, Radiation, and Radiation Protection. Weinheim: WILEY-VCH Verlag GmbH & Co. KGaA.10.1002/9783527616978]Search in Google Scholar
[2. Berzins, J., Riekstina, D., Veveris, O., and Malnacs, J. (2009). Radiation control of some contaminated territory of Latvia. In Leben mit Stralung – von den Grundlagen zur Praxis. 6. Gemeinsame Tagung der Österreichischen Verbundes für Strahlenschutz ÖVS und der Deutsch/Schweizerischen Fachverbandes für Strahlenschutz FS mit Workshop der Österreichishen Gessellschaft für Medizinishe Physik ÖGMP. 41. Jahrestagung der FS. 21–25 September 2009, Alpbach, Tirol (pp. 182–187). TÜV Media GmbH, TÜV Rheinland Group, Köln.]Search in Google Scholar
[3. Riekstina, D., and Veveris, O. (2010). Tritium concentration in drinking and ground water in Latvia. In International Conference on Advances in Liquid Scintillation Spectrometry. 6–10 September 2010, Paris, France (pp. 95–98) Joe Christensen, Inc., Lincoln, Nebraska, USA.]Search in Google Scholar
[4. Veveris, O., Riekstina, D., Taure, I., and Skujina, A. (2003). Forest ecosystem as accumulator of radionuclides. Ecology 2, 53–55.]Search in Google Scholar
[5. Rissanen, K., Ylipieti, J., Salminen, R., That, K., Giliucis, A., and Gregorauskiene, V. (2005). Cs-137 concentrations in the uppermost humus layer in the Baltic countries in 2003. INIS 36(47), Ref.No. 36109090. IAEA.]Search in Google Scholar
[6. Latvian Cabinet of Ministers. (2002). Regulation of Protection against Ionizing Radiation. Regulations No.149, adopted 09.04.2002 with amendments No.629 of 04.11.2003. Riga.]Search in Google Scholar
[7. European Commission. (1998). Directive 98/83/EC of 3 November 1998 on the Quality of Water Intended for Human Consumption. Luxembourg.]Search in Google Scholar
[8. Latvian State Standard. (2008). LVS ISO 10703:2008 Water Quality – Determination of the Activity Concentration of Radionuclides – Method by High Resolution Gamma-Ray Spectrometry. Riga]Search in Google Scholar
[9. Latvian State Standard. (2000). LVS ISO 257:2000 Building Material Quality – Determination of Radionuclides and Specific Activity of Radionuclides in Building Materials by Gamma Spectrometry. Riga.]Search in Google Scholar
[10. Canberra Industries. (1997). GENIE-2000. Basic Spectroscopy (Standalone) VI.2A Copyright.]Search in Google Scholar
[11. Latvian State Standard. (2011). LVS ISO 9698:2011 Water Quality – Determination of Tritium Activity Concentration – Liquid Scintillation Counting Method. Riga.]Search in Google Scholar
[12. Latvian State Standard. (2009). LVS ISO 10704:2009 Water Quality – Measurement of Gross Alpha and Gross Beta Activity in Non-saline Water. The Source Deposit Method. Riga.]Search in Google Scholar
[13. International Organization for Standardization. (2008). ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories.]Search in Google Scholar
[14. Stauton, S., and Raunband, M. (1997). Adsorption of Cs-137 on montmorillonite and illite: Effect of charge compensating cation, ionic strength, concentration of Cs, K and fulfic acid. Clay and Clay Minerals 45(2), 251–260.10.1346/CCMN.1997.0450213]Search in Google Scholar
[15. Riekstina, D., Veveris, O., and Zalitis, P. (1997). Forest litter as indicator of radioactive pollution. Baltic Forestry 3, 35–40.]Search in Google Scholar
