APA (7th ed.) Citation

Koopmans, L., & Wambsganß, J. (2009). Strong gravitational lensing as a probe of gravity, dark-matter and super-massive black holes. Arxiv.

Chicago Style (17th ed.) Citation

Koopmans, Leon, and Joachim Wambsganß. "Strong Gravitational Lensing as a Probe of Gravity, Dark-matter and Super-massive Black Holes." Arxiv 2009.

MLA (9th ed.) Citation

Koopmans, Leon, and Joachim Wambsganß. "Strong Gravitational Lensing as a Probe of Gravity, Dark-matter and Super-massive Black Holes." Arxiv, 2009.

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