1. Researches on the singing voice;Sacerdote;Acustica,1957
2. Frequenzmessungen an gesungenen Akkorden;Lottermoser;Acustica,1960
3. Zum Klang der Dresdner Kreuzchors;Lottermoser;Musik und Kirche,1969
4. Spectrographic analysis of the acoustical properties of selected vowels in choral sound [Dissertation];Hunt,1970
5. Fundamental frequency adjustment in barbershop singing;Hagerman;J Res Singing,1980