1. Hoelzel, W, Miedema, K. Development of a reference system for the international standardisation of HbA1c/glycohemoglobin determinations. JIFCC 1996;9:62-7

  2. Finke A., Kobold U, Hoelzel W, Weycamp C, Jeppsson JO, Miedema K. Preparation of a candidate primary reference material for the international standardisation of HbA1c determinations. Clin Chem Lab Med 1998; 36: 299-308

  3. Kobold U, Jeppsson JO, Dülffer Th, Finke A, Hoelzel W, Miedema K. Candidate Reference Methods for HbA1c based on Peptide Mapping. Clin Chem 1997; 43: 1944-51

  4. Jeppsson J-O, Kobold U, Barr J, Finke A, Hoelzel W, Hoshino T, Miedema K, Mauri P, Mosca A, Paroni R, Thienpont L, Umemoto M, Weykamp CW. Approved IFCC reference method for the of HbA1c in human blood. Clin Chem Lab Med 2002; 40: 78-89

  5. Hoelzel W, Weykamp C, Jeppsson JO, Miedema K, Barr JR, Goodall I, Hoshino T, John WG, Kobold U, Little R, Mosca A, Mauri P, Paroni R, Susanto F, Takei I, Thienpont L, Umemoto M, Wiedmeyer HM. IFCC Reference System for Measurement of Hemoglobin A1c in human blood and the national standardization schemes in the United States, Japan and Sweden: a method comparison study. Clin.Chem. 2004; 50: 166-174

  6. Report of the ADA/EASD/IDF Working Group of the HbA1c Assay. Diabetologia 2004; 46: R53-54

  7. Andrea Konnert, Christoph Berding, Sabine Arends, Curt Parvin, Curt L. Rohlfing, Hsiao-Mei Wiedmeyer, Randie Little, Carla Siebelder and Cas Weykamp. Statistical Rules for Laboratory Networks. Journal of Testing and Evaluation, Mar. 2006, vol. 34, No. 2

  8. Andrea Konnert, Sabine Arends, Stefan Schubert, Christoph Berding, Cas Weykamp and Carla Siebelder. Uncertainty calculation for calibrators of the IFCC HbA1c standardization network. Accred Qual Assur (2006) 11: 319-328

  9. Kaiser, P., Akerboom, T. Dux, L., Reinauer, H., Modification of the IFCC reference measurement procedure for determination of HbA1c by HPLC-ESI-MS. Ger.Med.Sci.4:Doc06 (2006)

  10. Andrea Mosca, Ian Goodall, Tadao Hoshino, Jan O. Jeppsson, W. Garry John, Randie R. Little, Kor Miedema, Gary L. Myers, Hans Reinauer, David B. Sacks and Cas W. Weykamp. Global standardization of glycated hemoglobin measurement: the position of the IFCC Working Group. Clin Chem Lab Med 2007, 45(8): 1077-1081

  11. Cas Weykamp, W Garry John, Andrea Mosca, Tadao Hoshino, Randie Little, Jan-Olof jeppsson, Ian Goodall, Kor Miedema, Gary Myers, Hans Reinauer, David B. Sacks, Robbert Slingerland, and Carla Siebelder. The IFCC Reference Measurement System for HbA1c: A 6-Year Progress Report. Clin Chem 2008, 54 (2): 240-48

  12. 12. Patricia Kaiser, Theodorus Akerboom, Petra Molnar and Hans Reinauer, Modified HPLC-Electrospray Ionization/Mass Spectrometry Method for HbA1c Based on IFCC Reference Measurement Procedure. Clin Chem 2008, 54(6): 1018-22

  13. Andrea Geistanger, Sabine Arends, Christoph Berding, Tadao Hoshino, Jan-Olof Jeppsson, Randie Little, Carla Siebelder and Cas Weykamp on behalf of the IFCC Working Group on Standardization of HbA1c: Statistical Methods for Monitoring the Relationship between the IFCC Reference Measurement Procedure for Hemoglobin A1c and the Designated Comparison Methods in the United States, Japan and Sweden. Clin Chem 2008, 54 (8): 1379-85

  14. Weykamp C, John WG, Mosca A. A review of the challenge in measuring hemoglobin A1c. J Diabetes Sci Technol 2009, 3 (3): 439-45

  15. Patricia Kaiser, Theodorus Akerboom, Rüdiger Ohlendorf and Hans Reinauer. Liquid Chromatography-Isotope Dilution-Mass Spectrometry as a New Basis for the Reference Measurement Procedure for Hemoglobin A1c Determination. Clin Chem 2010, 56(5): 750-54

  16. Cas W. Weykamp, Andrea Mosca, Philippe Gillery, Mauro Panteghini. The Analytical Goals for Hemoglobin A1c Measurement in IFCC Units and National Glycohemoglobin Standardization Program Units Are Different. Clin Chem 2011, 57(8): 1204-5

  17. Weykamp C. HbA1c: a review of analytical and clinical aspects. Ann Lab Med. 2013 Nov;33(6):393-400

  18. Weykamp C, Kemna E, Leppink S, Siebelder C. Glycation rate of haemoglobins S, C, D, E, J and G, and analytical interference on the measurement of HbA1c with affinity chromatography and capillary electrophoresis. Clin Chem Lab Med. 2015 Aug;53(9):e207-10.

  19. Weykamp C, John G, Gillery P, English E, Ji L, Lenters-Westra E, Little RR, Roglic G, Sacks DB, Takei I; IFCC Task Force on Implementation of HbA1c Standardization. Investigation of 2 models to set and evaluate quality targets for HbA1c: biological variation and sigma-metrics. Clin Chem. 2015 May;61(5):752-9.

  20. Mosca A, Paleari R, Carobene A, Weykamp C, Ceriotti F. Performance of glycated hemoglobin (HbA(1c)) methods evaluated with EQAS studies using fresh blood samples: Still space for improvements. Clin Chim Acta. 2015 Dec 7;451(Pt B):305-9.

  21. Kaiser P, Spannagl M, van Campenhout C, Lenga Y, Siebelder C, Weykamp C. HbA1c: EQA in Germany, Belgium and the Netherlands using fresh whole blood samples with target values assigned with the IFCC reference system. Clin Chem Lab Med. 2016 May 12