1. The aging voice: how to differentiate disease from normal changes;Reiss;Geriatrics,1998
2. The aging voice: influence of respiratory and laryngeal changes;Vaca;Otolaryngol Head Neck Surg,2015
3. Clinical Assessment of Glottal Insufficiency in age-related dysphonia;Vaca;J Voice,2016
4. La valutazione soggettiva ed oggettiva della disfonia: il protocollo sifel;Ricci Maccarini,2002
5. Presbyphonia: a review;Kendall;Curr Opin Otolaryngol Head Neck Surg,2007