Grande, Elisabetta, et al. “Celiac Disease: Is It Really Possible to Overcome Duodenal Biopsy?”. Acta Biomedica Atenei Parmensis, vol. 87, no. 1, May 2016, pp. 97-100, https://mattioli1885journals.com/index.php/actabiomedica/article/view/4516.