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2. Cheng, P. C., Newberry, S. P., Kim, H. G. and Wittman, M. D. (1989): X-ray contact microradiography and shadow projection X-ray microscopy, Europ. J. Cell Biology, 48 (25): 169–172.
3. Cheng, P. C., Newberry, S. P., Kim, H. G., Wittman, M. D. and Hwang, I. S. (1990): X-ray contact microradiography and shadow projection microscopy, in: Modern microscopy, eds. Duke, P. and Michette, A., 87–117. Plenum Press. New York.
4. Cheng, P. C., Lin, T. H., Shinozaki, D. M. and Newberry, S. P. (1991a): Projection microscopy and microtomography using x-rays, J. Scanning Microscopy, 13 (I): 10–11.
5. Cheng, P. C., Shinozaki, D. M., Lin, T. H., Newberry, S. P., Sridhar, R., Tarng, W., Chen, M. T. and Chen, L. H. (1991b): X-ray shadow projection microscopy and microtomography, in: Michette, A., Monies, G. R., and Buckley, C. J., editors, X-ray microscopy — III: 184–189, Springer-Verlag, Berlin.