APA (7th ed.) Citation

Amendola, L., Polarski, D., & Tsujikawa, S. (2007). Are f(R) dark energy models cosmologically viable? Physical review letters, 98(13), . https://doi.org/10.1103/PhysRevLett.98.131302

Chicago Style (17th ed.) Citation

Amendola, Luca, David Polarski, and Shinji Tsujikawa. "Are F(R) Dark Energy Models Cosmologically Viable?" Physical Review Letters 98, no. 13 (2007). https://doi.org/10.1103/PhysRevLett.98.131302.

MLA (9th ed.) Citation

Amendola, Luca, et al. "Are F(R) Dark Energy Models Cosmologically Viable?" Physical Review Letters, vol. 98, no. 13, 2007, https://doi.org/10.1103/PhysRevLett.98.131302.