Michell, John「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 of London』第74巻第0号、1784年、35-57頁、Bibcode: 1784RSPT...74...35M、doi:10.1098/rstl.1784.0008、ISSN0261-0523。
Kerr, Roy P.「Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics」『Physical Review Letters』第11巻第5号、1963年、237-238頁、doi:10.1103/PhysRevLett.11.237、ISSN0031-9007。
Michell, John「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 of London』第74巻第0号、1784年、35-57頁、Bibcode: 1784RSPT...74...35M、doi:10.1098/rstl.1784.0008、ISSN0261-0523。
Michell, John「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 of London』第74巻第0号、1784年、35-57頁、Bibcode: 1784RSPT...74...35M、doi:10.1098/rstl.1784.0008、ISSN0261-0523。
Kerr, Roy P.「Gravitational Field of a Spinning Mass as an Example of Algebraically Special Metrics」『Physical Review Letters』第11巻第5号、1963年、237-238頁、doi:10.1103/PhysRevLett.11.237、ISSN0031-9007。