Krauss L., Dodelson S. and Meyer S.Primordial Gravitational Waves and Cosmology. Science, 21 May 2010: Vol. 328 no. 5981 pp. 989–992.
443
Catching Waves with Kip Thorne. +Plus magazine… Living mathematics, University of Cambridge Centre for Mathematical Sciences Millinnium Maths Project, 23 November 2007, http://plus.maths.org/content/catching-waves-kip-thorne