1. Nisenson, P., Papaliolios, C., Karovska, M. & Noyes, R. Astrophys, J. 320, L15–L18 (1987).
2. Karovska, M., Koechlin, L., Nisenson, P., Papaliolios, C. & Standley, C. Astrophys. J. (in the press).
3. Papaliolios, C., Nisenson, P. & Ebstein, S. Appl. Opt. 24, 287–292 (1985).
4. Nisenson, P. Proc. NATO Adv. Study Inst. Cargese, France, Sept. 13–24 (Kluwer Amsterdam, in the press).
5. Karovska, M., Koechlin, L., Nisenson, P., Papaliolios, C. & Standley, C. IAU Circ. No. 4604 (1988).