![]() | ![]() |
Astron. Astrophys. 331, 925-933 (1998) AcknowledgementsThe authors wish to thank W.N. Brandt for many useful comments. KM acknowledges support by BMFT (DARA FKZ 50 OR 9308) and NB by the Deutsche Forschungsgemeinschaft under Re 353/22-1 to 4 and DARA 50 OR 960116. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: March 3, 1998 ![]() |