Peixoto, A., P. Ribeiro, and G. Macedo. “Degenerate Intraductal Papillary Mucinous Carcinoma With Fish-Mouth Appearance of the Papilla”. Journal of Gastrointestinal and Liver Diseases, Vol. 26, no. 2, June 2017, p. 113, doi:10.15403/jgld.2014.1121.262.pex.