MUSE observations of the counter-rotating nuclear ring in NGC 7742 Thomas P. K. Martinsson, Marc Sarzi, Johan H. Knapen, Lodovico Coccato, Jesús Falcón-Barroso, Bruce G. Elmegreen and Tim de Zeeuw A&A, 612 (2018) A66 Published online: 27 April 2018 DOI: 10.1051/0004-6361/201730955