« Gold Medal, the, presented to Prof. Friedrich Küstner, for his catalogue of stars, his pioneer determination of the aberration constant from motions in the line of sight, and his detection of the variation of latitude », Monthly Notices of the Royal Astronomical Society, vol. 65, , p. 857 (DOI10.1093/mnras/65.9.857, Bibcode1905MNRAS..65R.857.)
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« Gold Medal, the, presented to Prof. Friedrich Küstner, for his catalogue of stars, his pioneer determination of the aberration constant from motions in the line of sight, and his detection of the variation of latitude », Monthly Notices of the Royal Astronomical Society, vol. 65, , p. 857 (DOI10.1093/mnras/65.9.857, Bibcode1905MNRAS..65R.857.)