RICARDO, Vítor Doria et al. Multicenter Study on the Performance of Imaging Tests Compared to Endosonography-Guided Fine-Needle Aspiration in the Diagnosis of Solid Pseudopapillary Neoplasms of the Pancreas. GE Port J Gastroenterol [online]. 2023, vol.30, n.5, pp.49-57.  Epub Dec 01, 2023. ISSN 2341-4545.