1. Researches in Colour Vision;Abney,1913
2. Colour photometry;Abney;Philos. Trans. R. Soc. Lond.,1886
3. Pi1 cone monochromatism;Alpern;Arch. Ophthalmol.,1965
4. Lack of uniformity in colour matching;Alpern;J. Physiol.,1979
5. Variation in the Visual Pigments of Human Dichromats and Normal Human Trichromats;Alpern,1987