1. The effect of hierarchy on the encoding of meaning;Blois,1986
2. CEN TC251/PT2-002L, Structure for nomenclature, classification, and coding of properties in clinical laboratory sciences (CEN, ENV 1614:1994).
3. CEN TC251/PT3-008, Messages for exchange of laboratory information (CEN, ENV 1613:1994).
4. Measurement, value, and scale;Dybkaer;Scand. J. Clin. Lab. Invest.,1989
5. A quality manual for the clinical laboratory including the elements of a quality system;Dybkaer;Scand. J. Clin. Lab. Invest.,1993