A minor merger origin for stellar inner discs and rings in spiral galaxies M. C. Eliche-Moral, A. C. González-García, M. Balcells, J. A. L. Aguerri, J. Gallego, J. Zamorano and M. Prieto A&A, 533 (2011) A104 Published online: 08 September 2011 DOI: 10.1051/0004-6361/201116509