1. Differences in phonetogram features between male and female subjects with and without vocal training;Sulter;J Voice,1995
2. Normative voice range profiles of male and female professional voice users;Heylen;J Voice,2002
3. Reliability of speaking and maximum voice range measures in screening for dysphonia;Ma;J Voice,2007
4. Effects of age, sex, and disorder on voice range profile characteristics of 230 children;Wuyts;Ann Otol Rhinol Laryngol,2003
5. Quantitative analysis of professionally trained versus untrained voices;Siupsinskiene;Medicina (Kaunas),2003