APA (7th ed.) Citation

Wetterich, C. (2015). Can observations look back to the beginning of inflation? Physics letters, 754, . https://doi.org/10.1016/j.physletb.2016.01.027

Chicago Style (17th ed.) Citation

Wetterich, Christof. "Can Observations Look Back to the Beginning of Inflation?" Physics Letters 754 (2015). https://doi.org/10.1016/j.physletb.2016.01.027.

MLA (9th ed.) Citation

Wetterich, Christof. "Can Observations Look Back to the Beginning of Inflation?" Physics Letters, vol. 754, 2015, https://doi.org/10.1016/j.physletb.2016.01.027.