KIC 4247791: a SB4 system with two eclipsing binaries (2EBs) - A quadruple system? H. Lehmann, M. Zechmeister, S. Dreizler, S. Schuh and R. Kanzler A&A, 541 (2012) A105 Published online: 10 May 2012 DOI: 10.1051/0004-6361/201118298