References

• Bastian U., Röser S., Høg E., et al., 1996, AN 317, 281
• Brosche P., 1980, AJ 85, 1674 NASA ADS
• Brosche P., Geffert M., 1981, A&A 103, 78 NASA ADS
• Brosche P., Sinachopoulos D., 1987, MNRAS 227, 341 NASA ADS
• Brosche P., Ducourant C., Galas R., Geffert M., Karafistan A., 1991a, A&A 245, 669 NASA ADS
• Brosche P., Tucholke H.-J., Klemola A.R., et al., 1991b, AJ 102, 2022 NASA ADS
• Dick W.R., Tucholke H.-J., Brosche P., et al., 1993, A&A 279, 267 NASA ADS
• Froeschlé M., Kovalevsky J., 1982, A&A 116, 89 NASA ADS
• Geffert M., 1987, Absolute proper motions of globular clusters. in: Azzopardi M. and Matteucci F. (eds.), Stellar evolution in the Outer Halo of the Milky Way, ESO Conference Workshop Proceedings, München, p. 351
• Geffert M., Tucholke H.-J., Walter H.G., et al., 1989, A&A 224, 323 NASA ADS
• Geffert M., Colin J., LeCampion J.-F., Odenkirchen M., 1993, AJ 105, 168 NASA ADS
• Geffert M., Krümmel M., Schmidt H., 1995, A&AS 112, 229 NASA ADS
• Geffert M., Klemola A.R., Hiesgen M., 1997, A&AS (submitted)
• Klemola A.R., Jones B.F., Hanson R.B., 1987, AJ 94, 501 NASA ADS
• Kovalevsky J., Lindegren L., Johnston K.J., et al., 1997, A&A (in press)
• Lindegren L., Perryman M.A.C., Bastian U., et al., 1994, GAIA - Global Astrometric Interferometer for Astrophysics. in: Breckenridge J.B. (ed.): Amplitude and Intensity Spatial Interferometry II, SPIE Conf. Proc. 1947, p. 147
• LeCampion J.-F., Geffert M., Dulou M.-R., Colin J., 1992, A&AS 95, 233 NASA ADS
• Odenkirchen M., Brosche P., 1995, A&A 302, 915 NASA ADS
• Sinachopoulos D., 1986 (private communication)
• Tucholke H.-J., Brosche P., Odenkirchen M., 1997, A&AS (in press)