P, Ingala, Lepira F, and Mputu L. “Validation of Irma Cgea/Crenk One Method of Evaluation of the Vitamin D at the Regional Center of Nuclear Study Laboratory of Kinshasa”. American Scientific Research Journal for Engineering, Technology, and Sciences 38, no. 2 (December 10, 2017): 59–67. Accessed April 25, 2024. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3668.