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Astron. Astrophys. 364, L89-L92 (2000)
Acknowledgements
The authors SR, JD, KR and MD are grateful to IUCAA, Pune, India, for a short stay. It is also our great pleasure to thank Prof. C. S. Shukre of the Raman Research Institute, India, for important discussions.
© European Southern Observatory (ESO) 2000
Online publication: January 29, 2001
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