Stellar rotation and variability in the Orion Nebula Cluster W. Herbst, C. A. L. Bailer-Jones, R. Mundt, K. Meisenheimer and R. Wackermann A&A, 396 2 (2002) 513-532 Published online: 03 December 2002 DOI: 10.1051/0004-6361:20021362