1. IFCC primary reference procedures for the measurement of catalytic activity concentrations of enzymes at Part Reference procedure for the measurement of catalytic concentration of aspartate aminotransferase;Schumann;Clin Chem Lab Med,2002
2. for Standardization In vitro diagnostic medical devices measurement of quantities in biological samples metrological traceability of values for catalytic concentration of enzymes assigned to calibrators and control materials ISO ISO;Geneva;International Organization,2003
3. IFCC primary reference procedures for the measurement of catalytic activity concentrations of enzymes at Part Reference procedure for the measurement of catalytic concentration of alanine aminotransferase;Schumann;Clin Chem Lab Med,2002
4. for Standardization In vitro diagnostic medical devices measurement of quantities in biological samples metrological traceability of values assigned to calibrators and control materials ISO ISO;Geneva;International Organization,2003
5. IFCC primary reference procedures for the measurement of catalytic activity concentrations of enzymes at Part Reference procedure for the measurement of catalytic concentration of lactate dehydrogenase;Schumann;Clin Chem Lab Med,2002