Are isolated planetary-mass objects really isolated? - A brown dwarf-exoplanet system candidate in the σ Orionis clusterJ. A. Caballero, E. L. Martín, P. D. Dobbie and D. Barrado y NavascuésA&A, 460 2 (2006) 635-640DOI: https://doi.org/10.1051/0004-6361:20066162
