Wilson, Edwin B; Lewis, Gilbert N (1912). „The Space-Time Manifold of Relativity. The Non-Euclidean Geometry of Mechanics and Electromagnetics”. Proceedings of the American Academy of Arts and Sciences. 48 (11): 389—507. JSTOR20022840. doi:10.2307/20022840 — преко JSTOR.
Wilson, Edwin B; Lewis, Gilbert N (1912). „The Space-Time Manifold of Relativity. The Non-Euclidean Geometry of Mechanics and Electromagnetics”. Proceedings of the American Academy of Arts and Sciences. 48 (11): 389—507. JSTOR20022840. doi:10.2307/20022840 — преко JSTOR.