1. Allen, R. D., G. B. David, and G. Nomarski. The Zeiss-Nomarski differential interference equipment for transmitted light microscopy. Z. Wiss. Mikrosk. 69: 193–221, 1969.
2. Denk, W., J. H. Strickler, and W. W. Webb. Two-photon laser scanning fluorescence microscopy. Science 248: 73–76, 1990.
3. Goldstein, D. J. Understanding the Light Microscope: A Computer-Aided Introduction. San Diego: Academic Press, 1999.
4. Haugland, R. P. Handbook of Fluorescent Probes and Research Chemicals. Eugene, OR: Molecular Probes, Inc., 1994.
5. Heim, R., A. B. Cubitt, and R. Y. Tsien. Improved green fluorescence [letter]. Nature 373: 663–664, 1995.