1. Teager, H. M. (1980) ‘Some Observations on Oral Air Flow During Phonation’, IEEE Trans. Acoust., Speech, Signal Processing, ASSP-28, 599–601.
2. Morse, P. M. (1948) Vibration and Sound, McGraw-Hill Book Co., New York, NY.
3. Morse, P. M. and Ingard, U. (1968) Theoretical Acoustics, McGraw-Hill Book Co., New York, NY.
4. Bouasse, H. P. M. (1923) Jets, Tuyaux et Canaux, Librairie Delagrave, Paris, France.
5. Bouasse, H. P. M. (1926) Acoustique Générale, Librairie Delagrave, Paris, France.