1. P. Brassard, G. Fontaine, F. Wesemael, S.D. Kawaler, M. Tassoul (1991) Adiabatic properties of pulsating DA white dwarfs. I. The treatment of the Brunt-Väisälä frequency and the region of period formation. Astrophys. J. 367, 601–611
2. D. Brunt (1927) The period of simple vertical oscillations in the atmosphere. Q.J. Roy. Meteorol. Soc. 53, 30–32
3. D. Brunt (1934) Physical and Dynamical Meteorology. Cambridge University Press, New York
4. S. Chandrasekhar (1939) An Introduction to the Study of Stellar Structure. The University Press, Chicago
5. J.P. Cox (1980) Theory of Stellar Pulsation. The University Press, Princeton