1. B.L. Henke, P. Lee, T.J. Tanaka, R.L. Shimabukuro, B.K. Fujikawa: “The Atomic Scattering Factor, fl + i f2, for 94 Elements and for the 100 to 2000 eV photon energy region”, in: Low Energy X-Ray Diagnostics–1981, ed. by D.T. Attwood and B.L. Henke, AIP Conf. Proc. No. 75, p. 340–388 (1981)
2. G. Schmahl, D. Rudolph: “Proposal for a Phase Contrast X-Ray Microscope”, in: X-Ray Microscopy - Instrumentation and Biological Applications, ed. by P.C. Cheng and G.J. Jan (Springer, Berlin, Heidelberg), in press
3. D. Rudolph, B. Niemann, G. Schmahl and O. Christ: “The Göttingen X-Ray Microscope and X-Ray Microscopy Experiments at the BESSY Storage Ring”,ed. by G. Schmahl and D. Rudolph, Springer Series in Optical Sciences, Vol. 43 (Springer, Berlin, Heidelberg, 1984 ) p. 192–202
4. N.G. Nyakatura, W. Meyer-Ilse, P. Guttmann, B. Niemann, D. Rudolph, G. Schmahl, V. Sarafis, N. Hertel, E. Uggerh4j, E. Skriver, J.O.R. N¢rgaard and A.B. Maunsbach:“Investigations of Biological Specimens with the X-Ray Microscope at BESSY”, this volume
5. F. Zernike: “Das Phasenkontrastverfahren bei der mikroskopischen Beobachtung”, Zeitschr. f. techn. Physik, Nr. 11, p. 454–457 (1935)