RACE-OC project: rotation and variability in the ϵ Chamaeleontis, Octans, and Argus stellar associationsS. Messina, S. Desidera, A. C. Lanzafame, M. Turatto and E. F. GuinanA&A, 532 (2011) A10DOI: https://doi.org/10.1051/0004-6361/201016116