1. H. Walther, K.W. Rothe (eds.):Laser Spectroscopy IV, (Springer, Berlin, Heidelberg, New York 1979)
2. H. Nubbemeyer, B. Wende: Phys. Rev. A16, 627 (1977)
3. H. Nubbemeyer: Phys. Rev. A.21, 3 (1980)
4. The spectrometer has been additionally used for hyperfine structure measurements by a group from the Technische Universität Berlin in the short wavelength range, where conventional Fabry-Pérot spectrometers are no longer applicable
5. W. Leo: Z. Angew. Phys.8, 196 (1956).