Alberti, A., et al. “SHORT AND LONG THERM MONITORING BY HYG RESOLUTION ULTRASOUND AT POST-OPERATIVE THYROIDAL RESIDUE PERSONAL EXPERIENCE ON 200 THYROIDECTOMIES”. Annali Italiani Di Chirurgia, vol. 71, no. 5, Sept. 2000, pp. 547-58, https://annaliitalianidichirurgia.it/index.php/aic/article/view/2055.