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A guide to coordinate systems in Great Britain. This is available as a pdf document at
"ordnancesurvey.co.uk". Archived from the original on 2012-02-11. Retrieved 2012-01-11. Appendices B1, B2
Sudano, J. J. (1997). "An exact conversion from an earth-centered coordinate system to latitude, longitude and altitude". Proceedings of the IEEE 1997 National Aerospace and Electronics Conference. NAECON 1997. Vol. 2. pp. 646–650. doi:10.1109/NAECON.1997.622711. ISBN0-7803-3725-5. S2CID111028929.
A guide to coordinate systems in Great Britain. This is available as a pdf document at
"ordnancesurvey.co.uk". Archived from the original on 2012-02-11. Retrieved 2012-01-11. Appendices B1, B2