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Takeda, Yoichi; Kang, Dong-Il; Han, Inwoo; Lee, Byeong-Cheol; Kim, Kang-Min (2009). "Can Sodium Abundances of A-Type Stars be Reliably Determined from Na I 5890/5896 Lines?". Publications of the Astronomical Society of Japan. 61 (5): 1165–1178. arXiv:0907.1329. Bibcode:2009PASJ...61.1165T. doi:10.1093/pasj/61.5.1165. S2CID15454888.