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* [[Hora]]
* [[Hora]]
* [[Zona horària]]
* [[Zona horària]]
== Referències ==
* [https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat «Bulletin C». International Earth Rotation and Reference Systems Service]
* Chester, Geoff (15 de junio de 2015). «Wait a second... 2015 will be a little longer». CHIPS: The Department of the Navy's Information Technology Magazine. Department of the Navy.
* [http://maia.usno.navy.mil/ser7/tai-utc.dat «History of TAI-UTC». Time Service Dept., U.S. Naval Observatory. c. 2009]
* [https://library.si.edu/digital-library/book/annualreportofbo18861smit Fleming, Sandford (1886). «Time-reckoning for the twentieth century». Annual Report of the Board of Regents of the Smithsonian Institution (1): 345-366. Reprinted in 1889: 'Time-reckoning for the twentieth century']
== Bibliografia ==
* Allan, David W.; Ashby, Neil; Hodge, Clifford C. (1997). The Science of Timekeeping. Hewlett-Packar
* Finkleman, David; Allen, Steve; Seago, John; Seaman, Rob; Seidelmann, P. Kenneth (2011). «The Future of Time: UTC and the Leap Second». American Scientist 99 (July–August 2011): 312. Bibcode:2011arXiv1106.3141F. arXiv:1106.3141. doi:10.1511/2011.91.1
* McCarthy, Dennis D.; Seidelmann, P. Kenneth (2009). TIME From Earth Rotation to Atomic Physics. Weinheim: Wiley VCH. ISBN 978-3-527-40780-4
* Stephenson, F. R.; Morrison, L. V. (1995). «Long-term fluctuations in the Earth's rotation: 700 BC to AD 1990». Philosophical Transactions of the Royal Society A 351 (1695): 165-202. Bibcode:1995RSPTA.351..165S. S2CID 120718607. doi:10.1098/rsta.1995.0028.
==Enllaços externs==
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