1. Born, M., and Wolf, E., 1980, Principles of Optics, Pergamon Press, Oxford.
2. Cogswell, C.J., and Sheppard, C.J.R., 1990, Confocal brightfield imaging techniques using an on-axis scanning optical microscope. In: Confocal Microscopy (T. Wilson, ed.), Academic Press, New York, pp. 213–243.
3. Cogswell, C.J., Hamilton, D.K., and Sheppard, C.J.R., 1992, Color confocal reflection microscopy using red, green and blue lasers, J. Microsc. 165:103–117.
4. Doerr-Schott, J., 1989, Colloidal gold for multiple staining. In: Colloidal Gold: Principles, Methods, and Applications, Vol. 1 (M.A. Hayatt, ed.), Academic Press, New York, pp. 145–190.
5. Feick, R., 1925, Ann. Phys. 77(4):582.