@article{Stiele:2011B0, author = "Stiele, Rainer and Schaffner-Bielich, Juergen and Boeckel, Tillmann", title = "{Self-interacting Dark Matter Energy Density}", doi = "10.22323/1.123.0219", journal = "PoS", year = 2011, volume = "Texas 2010", pages = "219" }