1. Birch, R., Marshall, M., Ardran, G.M.: Catalogue of Spectral data for diagnostic X-rays. London, UK: the Hospital Physicist Association, Scientific Report series – 30; 1979.
2. Birch, R., Marshall, M.: Computation of bremsstrahlun X-ray spectra and comparison with spectra measured with a Ge(Li) detector, Phys. Med. Biol. 24 (1979) 505–517.
3. Seelentag, W.W., Panzer, W., Drexler, G., Platz, L., Santner, F.A.: Catalogue of spectra for the calibration of dosimeters. München Germany: Gesellschaft für Strahlen- und Umweltforschung mbH, GSF-Bericht 569, 1979.
4. Wall, B.F., Fisher, E.S.: Doses to patients from pantomographic and conventional dental radiography, Brit. J. Radiol. 52 (1979) 727–734.
5. Wall, B.F., Driscoll, C.M.H, Strong, J.C., Fischer, E.S.: The suitability of different preparations of thermoluminescent lithium borate for medical dosimetry. Phys. Med. Biol. 27 (1982) 1023–1034.