Magnetic field structure in single late-type giants: the effectively single giant V390 AurigaeR. Konstantinova-Antova, M. Aurière, P. Petit, C. Charbonnel, S. Tsvetkova, A. Lèbre and R. BogdanovskiA&A, 541 (2012) A44DOI: https://doi.org/10.1051/0004-6361/201116690