Manton, Jonathan H. (2005). "On the role of differential geometry in signal processing". Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005. Vol. 5. pp. 1021–1024. doi:10.1109/ICASSP.2005.1416480. ISBN978-0-7803-8874-1. S2CID12265584.
1868 On the hypotheses which lie at the foundation of geometry, translated by W.K.Clifford, Nature 8 1873 183 – reprinted in Clifford's Collected Mathematical Papers, London 1882 (MacMillan); New York 1968 (Chelsea) http://www.emis.de/classics/Riemann/. Also in Ewald, William B., ed., 1996 "From Kant to Hilbert: A Source Book in the Foundations of Mathematics", 2 vols. Oxford Uni. Press: 652–61.
Manton, Jonathan H. (2005). "On the role of differential geometry in signal processing". Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005. Vol. 5. pp. 1021–1024. doi:10.1109/ICASSP.2005.1416480. ISBN978-0-7803-8874-1. S2CID12265584.