1. Reddening and age for 13 southern Galactic open clusters determined
from integrated spectra
2. Alter, G., Ruprecht, J., & Vanisek, J. 1970, in Catalogue of Star Clusters and Associations, ed. G. Alter, B. Balázs, & J. Ruprecht
3. Gravitational tidal effects on galactic open clusters
4. Does Cyg OB2 harbour any open cluster?
5. Binney, J., & Tremaine, S. 1987, in Galactic Dynamics (Princeton, NJ: Princeton University Press), Princeton series in astrophysics