1. I. Babuška and S. Sauter, Is the pollution effect of the FEM avoidable for the Helmholtz equation considering high wave numbers? SIAM Review 42, 3 (2000), 451–484
2. A. Bamberger, P. Joly, and J.E. Roberts, Second-order absorbing boundary conditions for the wave equation: a solution for the corner problem, SIAM J. Numer. Anal., 27, 2, 1990, 323–352
3. K.-J. Bathe, Finite Element Procedures, Prentice-Hall, 1996
4. R. de Batist, Internal Friction of Structural Defects in Crystalline Solids (North-Holland, Amsterdam, Niederlande), 1972
5. M.A. Biot: Theory of propagation of elastic waves in a fluid saturated porous solid, part 1, J. Acoust. Soc. Am. 28 (1956), 168–178.