A parsec-scale wobbling jet in the high-synchrotron peaked blazar PG 1553+113 R. Lico, J. Liu, M. Giroletti, M. Orienti, J. L. Gómez, B. G. Piner, N. R. MacDonald, F. D’Ammando and A. Fuentes A&A, 634 (2020) A87 Published online: 12 February 2020 DOI: 10.1051/0004-6361/201936564