1. Beugungstheorie des schneidenver-fahrens und seiner verbesserten form, der phasenkontrastmethode
2. Transformation of Zernike coefficients: scaled, translated, and rotated wavefronts with circular and elliptical pupils
3. J. Loomis, in Reduct. Interpret. Interf., edited by A. Guenther and D. Liebenberg (ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, 1978), pp. 71-71–16.
4. M. Born and E. Wolf, Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light, 6th ed (Pergamon Press, Oxford ; New York, 1980).
5. Transmission electron microscopy with Zernike phase plate