1. BECKER, H., et al. Organikum, Organisch-Chemisches Grundpraktikum. 6th. Edition, Berlin, 1967, 253.
2. BELLAMY, L.J., Ultrarot-Spektrum und chemische Konsitution. Darmstadt, 1955.
3. BELLAMY, L.J., The infra red spectra of complex molecules. London, 1962.
4. The Post-Tetrad Ontogeny of the Pollen Wall and the Chemical Structure of the Sporopollenin of Lilium Henryi
5. BRÜGEL, W., Einführung in die Ultrarotspektroskopie, 4th edn, 1969.