Evolution of structure in late-type spiral galaxies - I. Ionized gas kinematics in NGC 628 K. Fathi, J. E. Beckman, A. Zurita, M. Relaño, J. H. Knapen, O. Daigle, O. Hernandez and C. Carignan A&A, 466 3 (2007) 905-916 Published online: 24 April 2007 DOI: 10.1051/0004-6361:20066990