1. European Commission. Council Directive 97/43/Euratom of 30 June 2997 on health protection of individuals against the danger of ionizing radiation in relation to medical exposure, and repealing Directive 84/466/Euratom. Official Journal of the European Commission L 180 (1997).
2. Lithuanian Hygiene Standard No. HN 31:2002. Radiation protection and safety in medicine X-rays diagnostic practice. State News No. 9-308 (2003).
3. Lithuanian Hygiene Standard No. HN 78:2003. Quality control in medical X-ray diagnostics. Requirements and evaluation criteria. State News No. 30-996 (2004).
4. Lithuanian Hygiene Standard No. HN 94-1999. Quality control in conventional and computed tomography and mammography screening. Requirements and evaluation criteria. State News No. 3-91 (2000).
5. UNSCEAR 2000 Report to the General Assembly, with scientific annexes. I: Sources, Annex D (NY: United Nations), pp. 93–98 (2000).