Col Reference --- --------- R1 Piatti, A.E., Claria J.J., Bica E. 2000, Astron. Astrophys. 360, 529 R2 Westerlund B. 1969, Astron. J. 74,882 Back to the form
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R1 Piatti, A.E., Claria J.J., Bica E. 2000, Astron. Astrophys. 360, 529
R2 Westerlund B. 1969, Astron. J. 74,882