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Astron. Astrophys. 331, 1108-1112 (1998) AcknowledgementsCritical comments by the reviewer Dr. M. Hénon are gratefully acknowledged. D.E. Santos Jr. was supported by a CNPq fellowship. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: March 3, 1998 ![]() |