Stellar rotation, binarity, and lithium in the open cluster IC 4756 K. G. Strassmeier, J. Weingrill, T. Granzer, G. Bihain, M. Weber and S. A. Barnes A&A, 580 (2015) A66 Published online: 04 August 2015 DOI: 10.1051/0004-6361/201525756