TY - JOUR T1 - Constraints on nonconformal couplings from the properties of the cosmic microwave background radiation. JO - Phys Rev Lett PY - 2013/10/18 AU - van de Bruck C AU - Morrice J AU - Vu S ED - DO - DOI: 10.1103/PhysRevLett.111.161302 VL - 111 IS - 16 SP - 161302 Y2 - 2025/08/11 ER -