Puumalainen, P., and T. Lahtinen. “Roentgen Ray Fluorescence Method for Determination of Iodine in Tissue”. Acta Oncologica 16, no. 6 (January 1, 1977): 529–537. Accessed February 26, 2025. https://medicaljournalssweden.se/actaoncologica/article/view/33901.