BD+20°2457 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "BD+20°2457" in Chinese language version.

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1web.archive.org

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arxiv.org

Niedzielski; et al. Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457 (abstract). The Astrophysical Journal. 2009, 707 (1): 768–777. doi:10.1088/0004-637X/707/1/768. (web preprint （页面存档备份，存于互联网档案馆）)

doi.org

Niedzielski; et al. Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457 (abstract). The Astrophysical Journal. 2009, 707 (1): 768–777. doi:10.1088/0004-637X/707/1/768. (web preprint （页面存档备份，存于互联网档案馆）)

iop.org

Niedzielski; et al. Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457 (abstract). The Astrophysical Journal. 2009, 707 (1): 768–777. doi:10.1088/0004-637X/707/1/768. (web preprint （页面存档备份，存于互联网档案馆）)

web.archive.org

Niedzielski; et al. Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457 (abstract). The Astrophysical Journal. 2009, 707 (1): 768–777. doi:10.1088/0004-637X/707/1/768. (web preprint （页面存档备份，存于互联网档案馆）)