APA (7th ed.) Citation

Pursimo, T., & Heidt, J. (2002). Deep optical imaging of radio selected BL Lacertae objects. Astronomy and astrophysics, 381(3), . https://doi.org/10.1051/0004-6361:20011564

Chicago Style (17th ed.) Citation

Pursimo, Tapio, and Jochen Heidt. "Deep Optical Imaging of Radio Selected BL Lacertae Objects." Astronomy and Astrophysics 381, no. 3 (2002). https://doi.org/10.1051/0004-6361:20011564.

MLA (9th ed.) Citation

Pursimo, Tapio, and Jochen Heidt. "Deep Optical Imaging of Radio Selected BL Lacertae Objects." Astronomy and Astrophysics, vol. 381, no. 3, 2002, https://doi.org/10.1051/0004-6361:20011564.