Nunes-Nogueira, V. S., F. Bolfi, F. R. K. Oliveira, G. M. F. S. Mazeto, and C. R. Nogueira. “A Malignant Metastatic Insulinoma As the First Clinical Presentation of Multiple Endocrine Neoplasia Type 1: A Case Report”. Asian Journal of Research and Reports in Endocrinology, Vol. 3, no. 1, June 2020, pp. 21-24, https://journalajrre.com/index.php/AJRRE/article/view/30108.