APA (7th ed.) Citation

Skottfelt, J., Giannini, E., & Lundkvist, M. S. (2013). EMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981. Astronomy and astrophysics, 555, . https://doi.org/10.1051/0004-6361/201321819

Chicago Style (17th ed.) Citation

Skottfelt, Jesper, Emanuela Giannini, and Mia S. Lundkvist. "EMCCD Photometry Reveals Two New Variable Stars in the Crowded Central Region of the Globular Cluster NGC 6981." Astronomy and Astrophysics 555 (2013). https://doi.org/10.1051/0004-6361/201321819.

MLA (9th ed.) Citation

Skottfelt, Jesper, et al. "EMCCD Photometry Reveals Two New Variable Stars in the Crowded Central Region of the Globular Cluster NGC 6981." Astronomy and Astrophysics, vol. 555, 2013, https://doi.org/10.1051/0004-6361/201321819.

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