APA (7th ed.) Citation

Kraus, A., Quirrenbach, A., Wagner, S., & Heidt, J. (1999). Unusual radio variability in the BL Lac object 0235+164. Arxiv.

Chicago Style (17th ed.) Citation

Kraus, Alexander, Andreas Quirrenbach, Stefan Wagner, and Jochen Heidt. "Unusual Radio Variability in the BL Lac Object 0235+164." Arxiv 1999.

MLA (9th ed.) Citation

Kraus, Alexander, et al. "Unusual Radio Variability in the BL Lac Object 0235+164." Arxiv, 1999.