References#
[bardell1991]
N .S. Bardell, “Free vibration analysis of a flat plate using the hierarchical finite element method”. Journal of Sound and Vibration, vol. 151, no. 2, pp. 263-289, 1991.
N .S. Bardell, “Free vibration analysis of a flat plate using the hierarchical finite element method”. Journal of Sound and Vibration, vol. 151, no. 2, pp. 263-289, 1991.