[1] G. M. L. Gladwell, “A Variational Formulation of Damped Acousto-Structural Vibration Problems,” Journal of Sound and Vibration, Vol. 4, 1966, pp. 172-186.
[2] A. Craggs, “A Finite Element Method for Damped Acoustic Systems: An Application to Evaluate the Performance of Reactive Mufflers,” Journal of Sound and Vibration, Vol. 48, No. 3, 1976, pp. 377-392.
[3] A. Craggs, “Coupling of Finite Element Acoustic Absorption Models,” Journal of Sound and Vibration, Vol. 66, No. 4, 1979, pp. 605-613.
[4] Y. J. Kang and J. S. Bolton, “Finite Element Modeling of Isotropic Elastic Porous Materials Coupled with Acoustical Finite Elements,” Journal of Acoustic Society of America, Vol. 98, No. 1, 1995, pp. 635-643.
[5] B. Tabarrok and F. P. J. Rimrott, “Variational Methods and Complementary Formulations in Dynamics,” Kluwer Academic Publishers, Kluwer, 1994.
[6] P. M. Morse and K. U. Ingard, “Theoretical Acoustics,” Elsevier, New York, 1968.
[7] A. Craggs, “A Finite Element Model for Rigid Porous Absorbing Materials,” Journal of Sound and Vibration, Vol. 61, No. 1, 1978, pp. 101-111.
[8] M. J. Crocker, “Handbook of Acoustics,” John Wiley & Sons, Inc., New York, 1998.