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APA Citation
Guo, H., Liu, X., Shen, Y., Loeb, A., Monroe, T., & Prochaska, J. X. (2019). constraining sub-parsec binary supermassive black holes in quasars with multi-epoch spectroscopy – III. Candidates from continued radial velocity tests. Monthly notices of the Royal Astronomical Society, 482(3), 3288–3307. http://access.bl.uk/ark:/81055/vdc_100092363498.0x000043