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Newton, Isaac; Chittenden, N. W. Life of Sir Isaac Newton; Adee, Daniel; Motte, Andrew; Hill, Theodore Preston Early American mathematics books CU-BANC (1846). Newton's Principia : the mathematical principles of natural philosophy. University of California Libraries. New-York : Published by Daniel Adee. p. 88.
A. Einstein (1924), "Über den Äther", Verhandlungen der Schweizerischen Naturforschenden Gesellschaft, 105 (2): 85–93. English translation: Concerning the AetherArchived 2010-11-04 at the Wayback Machine
harvard.edu
ui.adsabs.harvard.edu
Ferraro, Rafael (2007), Einstein's Space-Time: An Introduction to Special and General Relativity, Springer Science & Business Media, Bibcode:2007esti.book.....F, ISBN9780387699462
A. Einstein (1924), "Über den Äther", Verhandlungen der Schweizerischen Naturforschenden Gesellschaft, 105 (2): 85–93. English translation: Concerning the AetherArchived 2010-11-04 at the Wayback Machine