Versaci, Antonino, et al. “Acute Abdomen for Perforated Gastrointestinal Stromal Tumor( GIST). A Case Report”. Annali Italiani Di Chirurgia, vol. 80, no. 1, Jan. 2009, pp. 68-74, https://annaliitalianidichirurgia.it/index.php/aic/article/view/241.