Dark matter or the smell of sulphur?

Based on the article
"A novel scenario for the possible X-ray line feature at ~3.5 keV: Charge exchange with bare sulfur ions",
by
To be published in Astronomy & Astrophysics, 2015
Based on the article
"A novel scenario for the possible X-ray line feature at ~3.5 keV: Charge exchange with bare sulfur ions",
by
To be published in Astronomy & Astrophysics, 2015