KIC 4247791: a SB4 system with two eclipsing binaries (2EBs) - A quadruple system?H. Lehmann, M. Zechmeister, S. Dreizler, S. Schuh and R. KanzlerA&A, 541 (2012) A105DOI: https://doi.org/10.1051/0004-6361/201118298
