很多求解散射问题的数值积分方程法会引起共振问题，用矩量法求解磁场积分方程（MFIE）、电场积分方程（EFIE）以及联合场积分方程（CFIE）都有可能遇到个问题。
关于这个问题有若干个文献，比如：
D. Colton and R. Kress, Integral Equation Methods in Scattering Theory. New York: Wiley, 1983.
A. F. Peterson, "The 'interior resonance' problem associated with surface integral equations of electromagnetics: Numerical consequences and a survey of remedies," Electromagnetics, vol. 10, no. 3, pp. 293-312, July-Sept. 1990.
A. D. Yaghjian, "Augmented electric- and magnetic-field equations," Radio Sci.,vol. 16, pp. 987-1001, Nov. 1981.
R. Mittra and C. A. Klein, "Stability and convergence of moment method solutions," in Numerical and Asymptotic Techniques in Electromagnetics, R. Mittra, Ed. New York: Springer-Verlag, 1975.
K. M. Mitzner, "Numerical solution of the exterior .scattering problem at eigenfrequencics of the interior problem," I96H URSI Radio Sci. Mig. Dig., Boston, p. 75, Sept. 1968.
以及本篇：Solving electromagnetic scattering problems at resonance frequencies
内谐振（共振问题）处理的文献: Solving electromagnetic scattering problems at resonance frequencies.pdf
