1. Planck collaboration, P.A.R. Ade et al., Planck 2013 results. XXII. Constraints on inflation, arXiv:1303.5082 [ INSPIRE ].
2. Planck collaboration, P.A.R. Ade et al., Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity, arXiv:1303.5084 [ INSPIRE ].
3. D. Seery, M.S. Sloth and F. Vernizzi, Inflationary trispectrum from graviton exchange, JCAP 03 (2009) 018 [ arXiv:0811.3934 ] [ INSPIRE ].
4. T. Banks, M.R. Douglas, G.T. Horowitz and E.J. Martinec, AdS dynamics from conformal field theory, hep-th/9808016 [ INSPIRE ].
5. D. Harlow and D. Stanford, Operator Dictionaries and Wave Functions in AdS/CFT and dS/CFT, arXiv:1104.2621 [ INSPIRE ].