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Astron. Astrophys. 329, 1138-1144 (1998) AcknowledgementsWe would like to acknowledge the support of this work by the Key Project of the Academy of Sciences of the Czech Republic K1-003-601 and by Grant No. 205/97/0500 of the Grant Agency of the Czech Republic.
© European Southern Observatory (ESO) 1998 Online publication: December 16, 1997 ![]() |