K. S. Yee, “Numerical Solution of Initial Boundary Value Problems Involving Maxwells Equations in Isotropic Media,” IEEE Transactions on Antennas Propagation, Vol. 14, No. 3, May 1966, pp. 302-307.
 C. J. Railton and J. B. Schneider, “An Analytical and Numerical Analysis of Several Locally Conformal FDTD Schemes,” IEEE Transactions on Microwave Theory and Techniques, Vol. 47, No.1, January 1999, pp. 56-66.
 S. S. Zivanovic, K. S. Yee and K. K. Mei, “A subgridding Method for the Time-Domain Finite-Difference Method to Solve Maxwell’s Equations,” IEEE Transactions on Microwave Theory and Techniques, Vol. 39, No.3, March 1991, pp. 471-479.
 Y. Zhao, P. Belov and Y. Hao, “Spatially Dispersive Finite-Difference Time-Domain Analysis of Sub-Wavelength Imaging by the Wire Medium Slabs,” Optics Express, Vol. 14, No. 12, June 2006, pp. 5154-5167.
 F. Zheng, Z. Chen and J. Zhang, “Toward the Development of a Three-Dimensional Unconditionally Stable Finite-Difference Time-Domain Method,” IEEE Transactions on Microwave Theory and Techniques, Vol. 48, No. 9, September 2000, pp. 1550-1558.
 N. V. Kantartzis, T. T. Zygiridis and T. D. Tsiboukis, “An Unconditionally Stable Higher Order ADI-FDTD Technique for the Dispersionless Analysis of Generalized 3-D EMC Structures,” IEEE Transactions on Magnetics, Vol. 40, No. 2, March 2004, pp. 1436-1439.
 J. F. Lee, R. Palandech and R. Mittra, “Modeling Three-Dimensional Discontinuities in Waveguides Using Nonorthogonal FDTD Algorithm,” IEEE Transactions on Microwave Theory and Techniques, Vol. 40, No. 2, February 1992, pp. 346-352.
 A. J. Ward and J. B. Pendry, “Calculating Photonic Greens Functions Using a Nonorthogonal Finite-Diffe- rence Time-Domain Method,” Physical Review B, Vol. 58, No. 11, September 1998, pp. 7252-7259.
 W. Song, Y. Hao and C. G. Parini, “Calculating the Dispersion Diagram Using the Nonorthogonal FDTD Me- thod,” The Institution of Engineering and Technology (IET) Seminar on Metamaterials for Microwave and (Sub) Millimetrewave Applications: Electromagnetic Bandgap and Double Negative Designs, Structures, Devices and Experimental Validation, London, September 2006.
 S. L. Ray, “Numerical Dispersion and Stability Characteristics of Time-Domain Methods on Nonorthogonal Me- shes,” IEEE Transactions on Antennas and Propagation, Vol. 41, No. 2, February 1993, pp. 233-235.
 R. Schuhmann and T. Weiland, “Stability of the FDTD Algorithm on Nonorthogonal Grids Related to the Spatial Interpolation Scheme,” IEEE Transactions on Magnetics, Vol. 34, No. 5, September 1998, pp. 2751-2754.
 Y. Hao and C. J. Railton, “Analyzing Electromagnetic Structures with Curved Boundaries on Cartesian FDTD Meshes,” IEEE Transactions on Microwave Theory and Techniques, Vol. 46, No.1, January 1998, pp. 82-88.
 Y. Hao, V. Douvalis and C. G. Parini, “Reduction of Late Time Instabilities of the Finite Difference Time Domain Method in Curvilinear Coordinates,” IEE Proceedings, Part A, Science, Measurement and Technology, Vol. 149, No. 5, September 2002, pp. 267-272.
 H. Zheng, “3-D Nonorthogonal ADI-FDTD Algorithm for the Full-Wave Analysis of Microstrip Structure,” IEEE Antennas and Propagation Society International Symposium 2006, Albuquerque, July 2006, pp.1575-1578.