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Astron. Astrophys. 324, 457-460 (1997) AcknowledgementsAuthors are indebted to N.A.Tikhonov who has taken part in observations. This work has been supported by the RFBR grant 95-02-05781 and INTAS grant 95-IN-RU-1390. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1997 Online publication: May 26, 1998 ![]() |