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David, Trevor J.; Hillenbrand, Lynne A. (2015), «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, 804 (2), Bibcode:2015ApJ...804..146D, arXiv:1501.03154, doi:10.1088/0004-637X/804/2/146.
Thureau, N. D.; et al. (2014), «An unbiased study of debris discs around A-type stars with Herschel», Monthly Notices of the Royal Astronomical Society, 445 (3), Bibcode:2014MNRAS.445.2558T, doi:10.1093/mnras/stu1864.