1. DIN 6809, Teil 2, Klinische Dosimetrie, Brachytherapie mit umschlossenen gammastrahlenden radioaktiven Stoffen,1993
2. The half-life of high dose rate Ir-192 sources;Podgorsak;Med Phys,1993
3. Specification of brachytherapy source strength. AAPM Report No. 21,1987
4. Remote afterloading technology. AAPM Report No. 41,1993
5. Baltas D. Quality assurance in brachytherapy with special reference to the microSelectron-HDR. Activity Int Selectron Brachyther J, Special Report No. 2; 1993.