APA (7th ed.) Citation

Li, G., & Bartelmann, M. (2006). Smoothing algorithms and high-order singularities in gravitational lensing. Arxiv.

Chicago Style (17th ed.) Citation

Li, Guo-Liang, and Matthias Bartelmann. "Smoothing Algorithms and High-order Singularities in Gravitational Lensing." Arxiv 2006.

MLA (9th ed.) Citation

Li, Guo-Liang, and Matthias Bartelmann. "Smoothing Algorithms and High-order Singularities in Gravitational Lensing." Arxiv, 2006.

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