P I, F L, L M. Validation of Irma Cgea/crenk One Method of Evaluation of the Vitamin D at the Regional Center of Nuclear Study Laboratory of Kinshasa. ASRJETS-Journal. 2017;38(2):59-67. Accessed September 19, 2025. https://asrjetsjournal.org/American_Scientific_Journal/article/view/3668