Penttilä , I. M., J. Gävert, A. Julkunen, and T. Rantanen. “6.2.2 Quality Specifications for Glycated Hemoglobin A1c”. Upsala Journal of Medical Sciences 98, no. 3 (September 1, 1993): 395-399. Accessed April 2, 2026. https://ujms.net/index.php/ujms/article/view/7501.