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Astron. Astrophys. 360, 213-226 (2000) AcknowledgementsThe authors would like to acknowledge the financial support from NWO Pionier grant 600-78-333 and from NWO/NFRA grant 781-76-015. AdK also gratefully acknowledges support from NWO Spinoza grant 08-0 to E.P.J. van den Heuvel. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: July 27, 2000 ![]() |