Di Cataldo, Antonio, et al. “Synchronous Occurrence of Colon Adenocarcinoma and Gastric Schwannoma. Case Report and Review of the Literature”. Annali Italiani Di Chirurgia, vol. 84, no. 6, Nov. 2013, pp. 687-91, https://annaliitalianidichirurgia.it/index.php/aic/article/view/2332.