Short-term variability on the surface of (1) Ceres - A changing amount of water ice? D. Perna, Z. Kaňuchová, S. Ieva, S. Fornasier, M. A. Barucci, C. Lantz, E. Dotto and G. Strazzulla A&A, 575 (2015) L1 Published online: 11 February 2015 DOI: 10.1051/0004-6361/201425304