半正矢
參考文獻

1 2 3 4 5 6  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2015-11-06]. （原始内容存档于2005-03-10） （英语）.
↑  Fulst, Otto. . Lütjen, Johannes; Stein, Walter; Zwiebler, Gerhard  (编).  24. Bremen, Germany: Arthur Geist Verlag. 1972 （德语）.
↑  Sauer, Frank. . Hotheim am Taunus, Germany: Astrosail. 2015 [2004]  [2015-11-12]. （原始内容存档于2013-09-17） （德语）.
↑  Calvert, James B. . 2007-09-14 [2004-01-10]  [2015-11-08]. （原始内容存档于2007-10-02）.
↑  Rider, Paul Reece; Davis, Alfred. . New York, USA: D. Van Nostrand Company. 1923: 42  [2015-12-08]. （原始内容存档于2022-05-28）.
↑  . Wolfram Language & System: Documentation Center. 7.0. 2008  [2015-11-06]. （原始内容存档于2014-09-01）.
1 2  Rudzinski, Greg. Ix, Hanno. . Ocean Navigator (Portland, ME, USA: Navigator Publishing LLC). July 2015, (227): 42–43  [2015-11-07]. ISSN 0886-0149.
↑  H. B. Goodwin, The haversine in nautical astronomy, Naval Institute Proceedings, vol. 36, no. 3 (1910), pp. 735–746: Evidently if a Table of Haversines is employed we shall be saved in the first instance the trouble of dividing the sum of the logarithms by two, and in the second place of multiplying the angle taken from the tables by the same number.  This is the special advantage of the form of table first introduced by Professor Inman, of the Portsmouth Royal Navy College, nearly a century ago.
↑  W. W. Sheppard and C. C. Soule, Practical navigation (World Technical Institute: Jersey City, 1922).
↑  E. R. Hedrick, Logarithmic and Trigonometric Tables (Macmillan, New York, 1913).
↑  van Brummelen, Glen Robert. . Princeton University Press. 2013  [2015-11-10]. ISBN 9780691148922. 0691148929.
↑  de Mendoza y Ríos, Joseph. . Madrid, Spain: Imprenta Real. 1795  [2018-08-14]. （原始内容存档于2017-11-07） （西班牙语）.
1 2 3 4  Cajori, Florian.  2 2 (3rd corrected printing of 1929 issue). Chicago, USA: Open court publishing company. 1952: 172 [1929]  [2015-11-11]. ISBN 978-1-60206-714-1. 1602067147. The haversine first appears in the tables of logarithmic versines of José de Mendoza y Rios (Madrid, 1801, also 1805, 1809), and later in a treatise on navigation of James Inman (1821).
↑  White, J. D. . Nautical Magazine. February 1926.  (NB. According to Cajori, 1929, this journal has a discussion on the origin of haversines.)
↑  White, J. D. . Nautical Magazine. July 1926.  (NB. According to Cajori, 1929, this journal has a discussion on the origin of haversines.)
1 2  .  2nd. Oxford University Press. 1989.
↑  Inman, James.  3. London, UK: W. Woodward, C. & J. Rivington. 1835 [1821]  [2015-11-09]. （原始内容存档于2016-12-28）.
1 2  Archibald, Raymond Clare.  (PDF). Mathematical Tables and Other Aids to Computation (MTAC) (Review) (The National Research Council, Division of Physical Sciences, Committee on Mathematical Tables and Other Aids to Computation; American Mathematical Society). 1945-07-11, 1 (11): 421–422  [2015-11-19]. doi:10.1090/S0025-5718-45-99080-6. （原始内容存档 (PDF)于2015-11-19）.   （页面存档备份，存于）
↑  Farley, Richard. . London. 1856.  (A haversine table from 0° to 125°/135°.)
↑  Hannyngton, John Caulfield. . London. 1876.  (A 7-place haversine table from 0° to 180°, log. haversines at intervals of 15", nat. haversines at intervals of 10".)
↑  Stark, Bruce D.  2. Starpath Publications. 1997 [1995]  [2015-12-02]. ISBN 978-0914025214. 091402521X. （原始内容存档于2023-02-26）.  (NB. Contains a table of Gaussian logarithms lg(1+10−x).)
↑  Kalivoda, Jan.  (Review). Prague, Czech Republic. 2003-07-30  [2015-12-02]. （原始内容存档于2004-01-12）.  （页面存档备份，存于）
↑  Wolfram, Stephen. . from Wolfram Alpha: Computational Knowledge Engine, Wolfram Research （英语）.
1 2 3  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2023-02-01] （英语）.
↑  Korn, Grandino Arthur; Korn, Theresa M. .  3. Mineola, New York, USA: Dover Publications, Inc. 2000: 892–893 [1922]. ISBN 978-0-486-41147-7.
1 2  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2015-11-06]. （原始内容存档于2014-03-29） （英语）.
↑  van Vlijmen, Oscar. . Eenheden, constanten en conversies. 2005-12-28 [2003]  [2015-11-28]. （原始内容存档于2009-10-28） （英语）.
1 2  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2015-11-06]. （原始内容存档于2014-03-29） （英语）.
↑  Horst Rinne.  (PDF): 116. 2010  [2012-11-16]. （原始内容存档 (PDF)于2023-03-31）.
1 2  Weisstein, Eric W. (编). . at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc.  [2015-11-06]. （原始内容存档于2014-03-29） （英语）.
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