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Astron. Astrophys. 351, 212-224 (1999) AcknowledgementsThe work was partly supported by the EC Human Capital and Mobility (Networks) project "Late type stars: activity, magnetism, turbulence" No. ERBCHRXCT940483. This research has made use of the Simbad-database operated at CDS, Strasbourg, France. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: November 2, 1999 ![]() |