Stars and brown dwarfs in the σ Orionis cluster - III. OSIRIS/GTC low-resolution spectroscopy of variable sourcesJ. A. Caballero, A. Cabrera-Lavers, D. García-Álvarez and S. PascualA&A, 546 (2012) A59DOI: https://doi.org/10.1051/0004-6361/201219626
