Legendre's theorem on spherical triangles (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Legendre's theorem on spherical triangles" in English language version.

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2e-rara.ch

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archive.org (Global: 6^th place; English: 6^th place)

Tropfke (1903). Tropfke, Johannes (1903), Geschichte der Elementar-Mathematik (Volume 2)., Verlag von Veit, p. 295
Gauss (1828), Art. 26–28. Gauss, C. F. (1902) [1828], "General Investigations of Curved Surfaces of 1827 and 1825", Nature, 66 (1709), Princeton Univ. Lib: 316, Bibcode:1902Natur..66..316., doi:10.1038/066316b0; English translation of Disquisitiones generales circa superficies curvas (Dieterich, Göttingen, 1828).

doi.org (Global: 2^nd place; English: 2^nd place)

Delambre (1798). Delambre, Jean-Baptiste (1798), Méthodes analytiques pour la détermination d'un arc du méridien, Duprat, doi:10.3931/E-RARA-1836 – via ETH Zürich library
Gauss (1828), Art. 26–28. Gauss, C. F. (1902) [1828], "General Investigations of Curved Surfaces of 1827 and 1825", Nature, 66 (1709), Princeton Univ. Lib: 316, Bibcode:1902Natur..66..316., doi:10.1038/066316b0; English translation of Disquisitiones generales circa superficies curvas (Dieterich, Göttingen, 1828).

e-rara.ch (Global: low place; English: low place)

Legendre (1798). Legendre, Adrien-Marie (1798), Méthode pour déterminer la longueur exacte du quart du méridien d'après les observations faites pour la mesure de l'arc compris entre Dunkerque et Barcelone, pp. 12–14 (Note III [2])
Delambre (1798). Delambre, Jean-Baptiste (1798), Méthodes analytiques pour la détermination d'un arc du méridien, Duprat, doi:10.3931/E-RARA-1836 – via ETH Zürich library

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

Gauss (1828), Art. 26–28. Gauss, C. F. (1902) [1828], "General Investigations of Curved Surfaces of 1827 and 1825", Nature, 66 (1709), Princeton Univ. Lib: 316, Bibcode:1902Natur..66..316., doi:10.1038/066316b0; English translation of Disquisitiones generales circa superficies curvas (Dieterich, Göttingen, 1828).

virginmedia.com (Global: 6,051^st place; English: 3,586^th place)

mercator99.webspace.virginmedia.com

Buzengeiger (1818). An extended proof may be found in Osborne (2013) (Appendix D13). Other results are surveyed by Nádeník (2004). Osborne, Peter (2013), The Mercator Projections, archived from the original on 2013-09-24 Nádeník, Zbynek (2004), Legendre theorem on spherical triangles (PDF), archived from the original (PDF) on 2014-01-16
See Osborne (2013), Chapter 5. Osborne, Peter (2013), The Mercator Projections, archived from the original on 2013-09-24

vugtk.cz (Global: low place; English: low place)

Buzengeiger (1818). An extended proof may be found in Osborne (2013) (Appendix D13). Other results are surveyed by Nádeník (2004). Osborne, Peter (2013), The Mercator Projections, archived from the original on 2013-09-24 Nádeník, Zbynek (2004), Legendre theorem on spherical triangles (PDF), archived from the original (PDF) on 2014-01-16

web.archive.org (Global: 1^st place; English: 1^st place)

Buzengeiger (1818). An extended proof may be found in Osborne (2013) (Appendix D13). Other results are surveyed by Nádeník (2004). Osborne, Peter (2013), The Mercator Projections, archived from the original on 2013-09-24 Nádeník, Zbynek (2004), Legendre theorem on spherical triangles (PDF), archived from the original (PDF) on 2014-01-16
See Osborne (2013), Chapter 5. Osborne, Peter (2013), The Mercator Projections, archived from the original on 2013-09-24

Legendre's theorem on spherical triangles (English Wikipedia)

archive.org (Global: 6th place; English: 6th place)

doi.org (Global: 2nd place; English: 2nd place)