Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi, Jun'Ichi Yokoyama. Primordial non-gaussianities of gravitational waves in the most general single-field inflation model with second-order field equations.
Physical Review Letters, American Physical Society, 2011, 107, pp.211301.
⟨10.1103/PhysRevLett.107.211301⟩.
⟨insu-03645846⟩