Transient dust in warm debris disks - Detection of Fe-rich olivine grainsJ. Olofsson, A. Juhász, Th. Henning, H. Mutschke, A. Tamanai, A. Moór and P. ÁbrahámA&A, 542 (2012) A90DOI: https://doi.org/10.1051/0004-6361/201118735