1. Professional singers. The science and art of clinical care;Sataloff;Am J Otolaryngol,1981
2. Stimmlippenblutungen, Uberanstrengung beim Singen und falsche Atemfuhrung;Nadoleczny,1916
3. Voice, speech, language;Luchsinger,1965
4. Voice, speech, language;Luchsinger,1965
5. Hormones and the human voice;Brodnitz;Bull NY Acad Med,1971