EDP Sciences
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DOI https://doi.org/10.1051/0004-6361/201629463

The nature of 50 Palermo Swift-BAT hard X-ray objects through optical spectroscopy

A&A, Forthcoming article
Received: 02 August 2016 / Accepted: 05 February 2017
DOI: https://doi.org/10.1051/0004-6361/201629463