G. W. Bryant, E. L. Shirley, and L. S. Goldner, "A theory for imaging with transmission near-field optical microscopy,"
in Conference on Lasers and Electro-Optics, D. Killinger, G. Valley, C. Chang-Hasnain, and W. Knox, eds.,
Vol. 11 of OSA Technical Digest
(Optical Society of America, 1997), paper CWF37.