1. www.microscopyu.com/articles/fluorescence/fluorescenceintro.html (25/01/06)
2. www.omegafilters.com/front/curvomatic/spectra.php (25/01/06)
3. www.microscopyu.com/articles/confocal/confocalintrobasics.html (25/01/06)
4. www.microscopyu.com/articles/fluorescencemultiphoton/multiphotonintro.html (25/01/06)
5. Minsky, M.: Microscopy Apparatus, U.S. Patent 301467, issued December, 1961. The 1956 patent application for the Confocal Scanning Microscope is partially reproduced in the scanning article