Properties of flat-spectrum radio-loud narrow-line Seyfert 1 galaxies L. Foschini, M. Berton, A. Caccianiga, S. Ciroi, V. Cracco, B. M. Peterson, E. Angelakis, V. Braito, L. Fuhrmann, L. Gallo et al. (20 more) A&A, 575 (2015) A13 Published online: 11 February 2015 DOI: 10.1051/0004-6361/201424972