(en) Trevor J. David et Lynne A. Hillenbrand, « The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets », The Astrophysical Journal, , p. 146 (DOI10.1088/0004-637X/804/2/146, Bibcode2015ApJ...804..146D, arXiv1501.03154, S2CID33401607)
(en) Yoichi Takeda et al., « High-Dispersion Spectra Collection of Nearby F-K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards », Publications of the Astronomical Society of Japan, , p. 13–25 (DOI10.1093/pasj/57.1.13, Bibcode2005PASJ...57...13T)
(en) Trevor J. David et Lynne A. Hillenbrand, « The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets », The Astrophysical Journal, , p. 146 (DOI10.1088/0004-637X/804/2/146, Bibcode2015ApJ...804..146D, arXiv1501.03154, S2CID33401607)
(en) Yoichi Takeda, « Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database », Publications of the Astronomical Society of Japan, , p. 335–356 (DOI10.1093/pasj/59.2.335, Bibcode2007PASJ...59..335T)
(en) Yoichi Takeda et al., « High-Dispersion Spectra Collection of Nearby F-K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards », Publications of the Astronomical Society of Japan, , p. 13–25 (DOI10.1093/pasj/57.1.13, Bibcode2005PASJ...57...13T)
(en) Trevor J. David et Lynne A. Hillenbrand, « The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets », The Astrophysical Journal, , p. 146 (DOI10.1088/0004-637X/804/2/146, Bibcode2015ApJ...804..146D, arXiv1501.03154, S2CID33401607)
(en) Yoichi Takeda, « Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database », Publications of the Astronomical Society of Japan, , p. 335–356 (DOI10.1093/pasj/59.2.335, Bibcode2007PASJ...59..335T)
(en) Trevor J. David et Lynne A. Hillenbrand, « The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets », The Astrophysical Journal, , p. 146 (DOI10.1088/0004-637X/804/2/146, Bibcode2015ApJ...804..146D, arXiv1501.03154, S2CID33401607)