Hertzprung, Ejnar (1909). „Über die Sterne der Unterabteilung c und ac nach der Spektralklassifikation von
Antonia C. Maury“. Astronomische Nachrichten. 179 (4296): 373–380. Bibcode:1909AN....179..373H. doi:10.1002/asna.19081792402. line feed character არის |title=-ში №88 პოზიციაზე (დახმარება)
harvard.edu
ui.adsabs.harvard.edu
A.C. Maury; E.C. Pickering (1897). „Spectra of bright stars photographed with the 11-inch Draper Telescope as part of the Henry Draper Memorial“. Annals of Harvard College Observatory. 28: 1–128. Bibcode:1897AnHar..28....1M.
Hertzprung, Ejnar (1909). „Über die Sterne der Unterabteilung c und ac nach der Spektralklassifikation von
Antonia C. Maury“. Astronomische Nachrichten. 179 (4296): 373–380. Bibcode:1909AN....179..373H. doi:10.1002/asna.19081792402. line feed character არის |title=-ში №88 პოზიციაზე (დახმარება)