Kepler-539: A young extrasolar system with two giant planets on wide orbits and in gravitational interactionL. Mancini, J. Lillo-Box, J. Southworth, L. Borsato, D. Gandolfi, S. Ciceri, D. Barrado, R. Brahm and Th. HenningA&A, 590 (2016) A112DOI: https://doi.org/10.1051/0004-6361/201526357