Oldham, L. J. Galaxy structure from multiple tracers – II. M87 from parsec to megaparsec scales // Monthly Notices of the Royal Astronomical Society 457 (1). март 2016. DOI:10.1093/mnras/stv2982. с. 421 – 439.
Michell 1784, с. 35 – 57. Michell, J. On the Means of Discovering the Distance, Magnitude, &c. of the Fixed Stars, in Consequence of the Diminution of the Velocity of Their Light, in Case Such a Diminution Should be Found to Take Place in any of Them, and Such Other Data Should be Procured from Observations, as Would be Farther Necessary for That Purpose // Philosophical Transactions of the Royal Society 74 (0). 1784. DOI:10.1098/rstl.1784.0008. p. 35 – 57. (на английски)