Baily, F. «A catalogue of those stars in the "Histoire céleste française" of J. De Lalande for which tables of reduction to the session define format EPOCH1 = 1800 have been published by Professor Schumacher.». British Ass. Adv. Sci, 1847, 1847. Bibcode: 1950Lalan1847....0B.
Winnecke, Friedrich August Theodor «Bestimmung der parallaxe des zweiten Argelander-'schen sternes aus messungen AM heliometer der sternwarte zu Bonn in den jahren 1857–1858». Leipzig, W. Engelmann. Leipzig, 1872. Bibcode: 1872bpza.book.....W.
Afirmat a: Gaia Early Data Release 3. Indicat a la font segons: SIMBAD. Llengua del terme, de l'obra o del nom: anglès. Data de publicació: 3 desembre 2020.