Catching the radio flare in CTA 102 - III. Core-shift and spectral analysisC. M. Fromm, E. Ros, M. Perucho, T. Savolainen, P. Mimica, M. Kadler, A. P. Lobanov and J. A. ZensusA&A, 557 (2013) A105DOI: https://doi.org/10.1051/0004-6361/201321784