G. Giorgiani, D. Modesto, S. Fernández-Méndez, A. Huerta. High-order continuous and discontinuous Galerkin methods for wave problems. Int. J. Numer. Meth. Fluids (2013) DOI 10.1002/fld.3828
V. Darrigrand, Á. Rodríguez-Rozas, I. Muga, D. Pardo, A. Romkes, S. Prudhomme. Goal-oriented adaptivity using unconventional error representations for the multidimensional Helmholtz equation. Int. J. Numer. Meth. Engng 113(1) (2017) DOI 10.1002/nme.5601
A. Bockman, C. Fackler, N. Xiang. Bayesian-based estimation of acoustic surface impedance: Finite difference frequency domain approach. The Journal of the Acoustical Society of America 137(4) DOI 10.1121/1.4916711
L. Steffens, N. Parés, P. Díez. Goal-oriented h-adaptivity for the Helmholtz equation: error estimates, local indicators and refinement strategies. Comput Mech 47(6) (2011) DOI 10.1007/s00466-010-0557-2