CMB and 21-cm signals for dark matter with a long-lived excited stateDOI: info:10.1103/PhysRevD.78.063530v. 7863530
Finkbeiner, Douglas P., Padmanabhan, Nikhil, and Weiner, Neal. 2008. "CMB and 21-cm signals for dark matter with a long-lived excited state." Physical Review D, 78 63530. https://doi.org/10.1103/PhysRevD.78.063530.