Nussbaumer, Harry (2013). 'Slipher's redshifts as support for de Sitter's model and the discovery of the dynamic universe' In Origins of the Expanding Universe: 1912-1932. Astronomical Society of the Pacific. m/s. 25–38.Physics ArXiv preprint
O'Raifeartaigh, Cormac (2013). The Contribution of V.M. Slipher to the discovery of the expanding universe in 'Origins of the Expanding Universe'. Astronomical Society of the Pacific. m/s. 49–62.Physics ArXiv preprint
"Henry Draper Medal". National Academy of Sciences. Diarkibkan daripada yang asal pada January 26, 2013. Dicapai pada 24 February 2011. Unknown parameter |deadurl= ignored (bantuan)
"Henry Draper Medal". National Academy of Sciences. Diarkibkan daripada yang asal pada January 26, 2013. Dicapai pada 24 February 2011. Unknown parameter |deadurl= ignored (bantuan)
wikipedia.org
en.wikipedia.org
"Henry Draper Medal". National Academy of Sciences. Diarkibkan daripada yang asal pada January 26, 2013. Dicapai pada 24 February 2011. Unknown parameter |deadurl= ignored (bantuan)
worldcat.org
"Nesto (sic) Slipher, 93, Astronomer, Dies". The New York Times. Flagstaff, AZ (diterbitkan November 10, 1969). November 9, 1969. m/s. 47. ISSN0362-4331CS1 maint: postscript (link)