References for PMLs and Infinite Element Domains
1. O.C. Zienkiewicz, C. Emson, and P. Bettess, “A Novel Boundary Infinite Element,” Int. J. Numer. Methods Eng., vol. 19, no. 3, pp. 393–404, 1983.
2. J.P. Bérenger, “A Perfectly Matched Layer for the Absorption of Electromagnetic Waves,” J. Comput. Phys., vol. 114, pp. 185–200, 1994.
3. Jianming Jin, The Finite Element Method in Electromagnetics, 2nd ed., Wiley-IEEE Press, 2002.