Astron. Astrophys. 320, 672-680 (1997)

Acknowledgements

The authors are grateful to Dr. M. idlichovský, who supplied them with an algorithm of the high-to-low frequency determination technique, and to Dr. C. Beaugé for valuable suggestions to the manuscript. This work was sponsored by the Research Foundation of the State of São Paulo.

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998
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