Astron. Astrophys. 355, 966-978 (2000)

Acknowledgements

We thank the referee, Gary Da Costa, for helpful suggestions that improved the final presentation of the manuscript. I.S. acknowledges the financial support of Italian and Spanish Foreign Ministries, through an `Azioni Integrate/Acciones Integradas' grant.

© European Southern Observatory (ESO) 2000

Online publication: April 3, 2000
helpdesk.link@springer.de