APA (7th ed.) Citation

Kormann, R., Schneider, P., & Bartelmann, M. (1994). Isothermal elliptical gravitational lens models. Astronomy and astrophysics, 284(1), .

Chicago Style (17th ed.) Citation

Kormann, Robert, Peter Schneider, and Matthias Bartelmann. "Isothermal Elliptical Gravitational Lens Models." Astronomy and Astrophysics 284, no. 1 (1994).

MLA (9th ed.) Citation

Kormann, Robert, et al. "Isothermal Elliptical Gravitational Lens Models." Astronomy and Astrophysics, vol. 284, no. 1, 1994.