Searching for narrow absorption and emission lines in XMM-Newton spectra of gamma-ray bursts S. Campana, V. Braito, P. D’Avanzo, G. Ghirlanda, A. Melandri, A. Pescalli, O. S. Salafia, R. Salvaterra, G. Tagliaferri and S. D. Vergani A&A, 592 (2016) A85 Published online: 02 August 2016 DOI: 10.1051/0004-6361/201628402