A novel scenario for the possible X-ray line feature at ~3.5 keV - Charge exchange with bare sulfur ionsL. Gu, J. Kaastra, A. J. J. Raassen, P. D. Mullen, R. S. Cumbee, D. Lyons and P. C. StancilA&A, 584 (2015) L11DOI: https://doi.org/10.1051/0004-6361/201527634
