1. ANSI, 1995. American national standard traceability of radioactive sources to NIST and associated instrument quality control. N42.22-1995, American National Standards Institute, New York, 16pp.
2. ANSI, 1996. American national standard measurement and associated instrumentation quality assurance for radioassay laboratories. N42.23-1996, American National Standards Institute, New York, 64pp.
3. The probability plot correlation coefficient test for normality;Filliben;Technometrics,1975
4. HPS, 1996. An American national standard-performance criteria for radiobioassay. HPS N13.30-1996, Health Physics Society, Virginia, 112pp.
5. ISO, 1993. International vocabulary of basic and general terms in metrology (VIM), International Organization for Standardization, Geneva, 60pp.