1. Andrews, J. W. and Coates, P. B. (1975). Standard lamps and their calibration. Temperature-75, Inst. of Physics Conf., Series No 26, 256–263.
2. Deviations from the Stefan-Boltzmann law at low temperatures;Baltes;Applied Physics,1973
3. Planck's radiation law for finite cavities and related problems;Baltes;Infrared Physics,1976
4. Spectral density, thermodynamics and temporal coherence of non-Planckian blackbody radiation for small cavities;Baltes;Optics Comm.,1970
5. “Spectra of Finite Systems”;Baltes,1976