“The Determination of Copper and Other Trace Elements in Serum Samples from Patients With Biliary Tract Cancers: Prospective Noninterventional Nonrandomized Clinical Study Protocol”. Radiology and Oncology 58, no. 2 (June 10, 2024): 300–310. Accessed September 24, 2026. https://www.radioloncol.com/index.php/ro/article/view/4330.