1. Importance of warm-up and cool down on exercise performance;Karvonen,1992
2. Solutions for Singers;Miller,2004
3. Placido Domingo—My First Forty Years;Domingo,1983
4. Vocal warm-up practices and perceptions in vocalists: a pilot survey;Gish;J Voice,2012
5. Great Singers on Great Singing;Hines,1982