1. Parliament of the Czech Republic (2002) Czech Metrological Act No. 137/2002 Coll. Parliament of the Czech Republic, Prague
2. MIT (2000) Decree No. 262/2000. Ministry of Industry and Trade, Prague
3. Prouza Z (1999) System of quality assurance at nuclear medicine departments. State Office for Nuclear Safety, Prague
4. OSMT (1997) Standard EN 61303. Czech Office for Standards, Metrology and Testing, Prague
5. IAEA (2006) Quality assurance for radioactivity measurement in nuclear medicine, technical report series no. 454. IAEA, Vienna, p 64