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Astron. Astrophys. 351, 161-167 (1999) AcknowledgementsWe thank F. Herwig for providing additional information about his results, and P. Wood for useful discussions. Our referee, Y. Tuchman, is acknowledged for important comments about this paper. The work by L. Girardi is funded by the Alexander von Humboldt-Stiftung. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: November 2, 1999 ![]() |