Magnitude-range brightness variations of overactive K giants K. Oláh, A. Moór, Zs. Kővári, T. Granzer, K. G. Strassmeier, L. Kriskovics and K. Vida A&A, 572 (2014) A94 Published online: 03 December 2014 DOI: 10.1051/0004-6361/201424695