Cimerman, Nina, Pika Meško-Brguljan, Marta Krašovec, Stanislav Šuškovič, and Janko Kos. “Circadian Rhythms of Cysteine Proteinases and Cystatins, Potential Tumour Markers, in Normal Sera”. Radiology and Oncology 36, no. 2 (June 1, 2002). Accessed June 10, 2026. https://radioloncol.com/index.php/ro/article/view/1417.