Kamionkowski, Spergel, Sugiyama, Small-Scale Cosmic Microwave Background Anisotropies as a Probe of the Geometry of the Universe, Astroph. J., 426, 1994, L 57, arxiv:astro-ph/9401003
doi.org
Griest, Kamionkowki, Unitarity limits on the mass and radius of dark-matter particles, Phys. Rev. Lett., 64, 1990, 615, doi:10.1103/PhysRevLett.64.615