Apperti, Marco, et al. “The Use of Transillumination As a Rational Approach to Sclerotherapy Amd End Endovascular Laser Ablation of Varices. Results in the Use of an Original Instrument”. Annali Italiani Di Chirurgia, vol. 87, no. 4, July 2016, pp. 396-9, https://annaliitalianidichirurgia.it/index.php/aic/article/view/1980.