Transit mapping of a starspot on CoRoT-2 - Probing a stellar surface with planetary transits U. Wolter, J. H. M. M. Schmitt, K. F. Huber, S. Czesla, H. M. Müller, E. W. Guenther and A. P. Hatzes A&A, 504 2 (2009) 561-564 Published online: 15 July 2009 DOI: 10.1051/0004-6361/200912329