1. 1Miller R: National Schools of Singing: English, French, German and Italian Techniques of Singing Revisited. Latham, Scarecrow Press, 1997.
2. 2Vennard W: Singing: The Mechanism and the Technic. New York, Fischer, 1967.
3. 3Miller R: The Structure of Singing. New York, Schirmer, 1986.
4. 4Conable B: The Structures and Movement of Breathing. Chicago, GIA Publications, 2000.
5. 5Bunch M: Dynamics of the Singing Voice. Vienna, Springer, 1982.