1. Approved recommendation (1978) on quality control in clinical chemistry. Part 1. General principles and terminology;Buttner;J Clin Chem Clin Biochem,1980
2. Approved recommendation (1979) on quality control in clinical chemistry. Part 6. Quality requirements from the point of view of health care;Buttner;J Clin Chem Clin Biochem,1980
3. Analytical goals in clinical biochemistry;Fraser;Prog Clin Pathol,1981
4. Desirable performance standards for clinical chemistry tests;Fraser;Adv Clin Chem,1983