1. Bernard, G.D.: Evidence for visual function of corneal interference filters. J. Insect Physiol.177, 2287?2300 (1971)
2. Bernard, G.D.: Spectral sensitivity of the dark-adapted butterfly pupil. Invest. Ophthalmol. Visual Sci.15, Suppl., 17 (1976a)
3. Bernard, G.D.: Non-invasive optical probe of the invertebrate eye. J. Opt. Soc. Am.66, 1120 (1976b)
4. Bernard, G.D.: Discovery of red-receptors in butterfly retinas. Invest. Ophthalmol. Visual Sci.16, Suppl. 61 (1977a)
5. Bernard, G.D.: Non-invasive microspectrophotometry of butterfly photoreceptors. J. Opt. Soc. Am.67, 1362 (1977b)