Seares, Frederick H. (1930). "Address of the Retiring President of the Society in Awarding the Bruce Medal to Professor Max Wolf". Publ. Astr. Soc. Pacific. 42: 5–22, at p 10. Bibcode:1930PASP...42....5S. doi:10.1086/123986.
Rümker, G. (1855). "Name und Zeichen des von Herrn R. Luther zu Bilk am 19. April entdeckten Planeten". Astronomische Nachrichten. 40 (24): 373. doi:10.1002/asna.18550402405.
Hale, George E. (1916). "Address at the semi-centennial of the Dearborn Observatory: Some Reflections on the Progress of Astrophysics". Popular Astronomy. 24: 550–558, at p 555. Bibcode:1916PA.....24..550H.
Seares, Frederick H. (1930). "Address of the Retiring President of the Society in Awarding the Bruce Medal to Professor Max Wolf". Publ. Astr. Soc. Pacific. 42: 5–22, at p 10. Bibcode:1930PASP...42....5S. doi:10.1086/123986.
"Provisional Designations". Minor Planet Center (dalam bahasa bahasa Inggris). 24-04-2016. Diakses tanggal 25-04-2016.Periksa nilai tanggal di: |accessdate=, |date= (bantuan)Pemeliharaan CS1: Bahasa yang tidak diketahui (link)