Rusu, Andreea, et al. “Cephalic Undifferentiated Carcinoma With Osteoclast-Like Giant Cells Arising from the Main Pancreatic Duct: Case Report and Literature Review”. Archive of Clinical Cases, vol. 6, no. 1, Apr. 2019, pp. Arch Clin Cases 2019; 6(1):6-21, https://doi.org/10.22551/2019.22.0601.10148.