Farjadpour, Ardavan, David Roundy, Alejandro Rodriguez, Mihai Ibanescu, Peter Bermel, G. Burr, J. D. Joannopoulos, and Steven G. Johnson. 2006. “Improving Accuracy by Sub-Pixel Smoothing in the Finite-Difference Time Domain”. OL 31: 2972–2974. Referenced from www.opticsinfobase.org: Improving accuracy by sub-pixel smoothing in the finite-difference time domain.