2576 20160701171707.0 ASTROimport-733 Blomme, R. 2008 Corotating Interaction Regions and clumping We present hydrodynamical models for Corotating Interaction Regions, which were used by Lobel (2007) to model the Discrete Absorption Components in HD 64760. We also discuss our failure to model the rotational modulations seen in the same star. Clumping in Hot-Star Winds 2008 151 http://esoads.eso.org/abs/2008cihw.conf..151B published in NONREF