Origin of the spectacular tidal shells of galaxy NGC 474 Michal Bílek, Jérémy Fensch, Ivana Ebrová, Srikanth T. Nagesh, Benoit Famaey, Pierre-Alain Duc and Pavel Kroupa A&A, 660 (2022) A28 Published online: 05 April 2022 DOI: 10.1051/0004-6361/202141709