APA (7th ed.) Citation

Paczyński, B., & Wambsganß, J. (1989). Gravitational lensing by a smoothly variable surface mass density. The astrophysical journal, 337(?), .

Chicago Style (17th ed.) Citation

Paczyński, Bohdan, and Joachim Wambsganß. "Gravitational Lensing by a Smoothly Variable Surface Mass Density." The Astrophysical Journal 337, no. ? (1989).

MLA (9th ed.) Citation

Paczyński, Bohdan, and Joachim Wambsganß. "Gravitational Lensing by a Smoothly Variable Surface Mass Density." The Astrophysical Journal, vol. 337, no. ?, 1989.