1. Aime, C., Kadiri, S., Ricort, G., Roddier, C. and Vernin, J. 1979, Opt. Acta
26, 575.
2. SPIE;A Blazit,1986
3. Borgnino, J., Aime, C., Lazrek, M., Martin, F., Petrov, R. G. and Ricort, G. 1988, J. Opt. Soc. Am. A, submitted, July 1988.
4. Christou, J. C., Cheng., A. Y. S., Hege, E. K. and Roddier, C. 1986, Astron. J. 90, 2644.
5. Christou, J. C. 1988, in Proc. of the NOAO-ESO Conference on High-Resolution Imaging by Interferometry, Garching, 15–18 March 1988.