Absolute kinematics of radio source components in the complete S5 polar cap sample - III. First wide-field high-precision astrometry at 15.4 GHzI. Martí-Vidal, J. M. Marcaide, J. C. Guirado, M. A. Pérez-Torres and E. RosA&A, 478 1 (2008) 267-275DOI: https://doi.org/10.1051/0004-6361:20078067