M W McCall

Causality-based criteria for a negative refractive index must be used with care.

M. McCall, P. Kinsler, P Kinsler, 2008, Physical review letters.

Simple computational model of image correlation by four-wave mixing in photorefractive media.

C. R. Petts, M. McCall, M. Nicholson, 1987, Applied optics.