On the influence of the Sun on the rapid variability of compact extragalactic sourcesN. Marchili, T. P. Krichbaum, X. Liu, H.-G. Song, J. M. Anderson, A. Witzel and J. A. ZensusA&A, 530 (2011) A129DOI: https://doi.org/10.1051/0004-6361/201016033