1. Direct determination of colour-sensitivity of photographic layers by spectrographs;Bertling;Phot. Ind.,1931
2. Absolute colour-sensitivity of photographic emulsions;Biltz;Physikal. Z.,1935
3. Eder, J. M.: “Colour-sensitivity curves.” Phot. Ind., 1929: 852.
4. Spectral sensitograph for recording colour-sensitivity curves of photographic coatings;Foige;Phot. Korr.,1935
5. Spectro-sensitometry for the determination of a colour-sensitive curve;Foige;Atelier Phot.,1935