Gilsinn, D.
, Hansen, H.
, Huerta-Garnica, M.
and Teague, E.
(1991),
Comparison of finite element and analytic calculations of the resonant modes and frequencies of a thick shell sphere:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.4568
(Accessed December 12, 2024)