1. On the optical counterparts, long-term variabilities, radio jets, and accretion sources in 1E 1740.7-2942 and GRS 1758-258
2. Optical Positions for a Sample of ICRF Sources
3. Djorgovski, S., Thompson, D., Mazzarella, J., Klemola, A., Neugebauer, G., Matthews, K. & Armus, L. 1992, IAU Circ. 5596
4. Kuznetsov, S., etal 1996, in Proc. Rontgenstrahlung from the Universe, ed. H. U. Zimmermann, J. Trumper, & H. Yorke (MPE Report 263; Garching: MPE), 157
5. Long‐Term X‐Ray Monitoring of 1E 1740.7−2942 and GRS 1758−258