APA (7th ed.) Citation

Doran, M., Khamphee Karwan, & Wetterich, C. (2005). Observational constraints on the dark energy density evolution. Arxiv.

Chicago Style (17th ed.) Citation

Doran, Michael, Khamphee Karwan, and Christof Wetterich. "Observational Constraints on the Dark Energy Density Evolution." Arxiv 2005.

MLA (9th ed.) Citation

Doran, Michael, et al. "Observational Constraints on the Dark Energy Density Evolution." Arxiv, 2005.

Warning: These citations may not always be 100% accurate.