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2. W. Hoppe, P. Bussler, A. Feltynowski, N. Hunsmann, A. Hirt: “Some Experience with Computerized Image Reconstruction Methods”, in Image Processing and Computer-Aided Design in Electron Optics, ed. by P.W. Hawkes ( Academic Press, London 1973 ) pp. 91–126
3. R. Hegerl, W. Hoppe: Z. Naturforsch. 31a, 1717–1721 (1976)
4. A. Jones: J. Appi. Cryst. 11, 268 (1978)
5. W. Hoppe: Acta Cryst. k26, 414–426 (1970)