Published in
American Astronomical Society, Astrophysical Journal Supplement, 2(241), p. 33, 2019
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A Possible ∼20 yr Periodicity in Long-term Optical Photometric and Spectral Variations of the Nearby Radio-quiet Active Galactic Nucleus Ark 120
Journal article published in 2019 by
Yan-Rong Li 
,
Jian-Min Wang ,
Zhi-Xiang Zhang ,
Kai Wang ,
Ying-Ke Huang,
Kai-Xing Lu ,
Chen Hu,
Pu Du ,
Edi Bon ,
Luis C. Ho ,
Jin-Ming Bai,
Wei-Hao Bian ,
Ye-Fei Yuan,
Hartmut Winkler ,
Eduard K. Denissyuk
and other authors.
,
Jian-Min Wang ,
Zhi-Xiang Zhang ,
Kai Wang ,
Ying-Ke Huang,
Kai-Xing Lu ,
Chen Hu,
Pu Du ,
Edi Bon ,
Luis C. Ho ,
Jin-Ming Bai,
Wei-Hao Bian ,
Ye-Fei Yuan,
Hartmut Winkler ,
Eduard K. Denissyuk
and other authors.
This paper is made freely available by the publisher.
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