Euclid
- Euclid Book 5, Def. 5
- Ali Sinan Sertöz, Öklid ve Elemanları, Bilim ve Teknik yazısı, 2018
- Ali Sinan Sertöz, Öklid'i Okurken, Bilim ve Teknik yazısı, 2018
- Ali Sinan Sertöz, Öklid ve Türkçesi, Bilim ve Teknik yazısı, 2018
- Ali Sinan Sertöz, Bütün Bilim ve Teknik yazıları
- Euclid's Elements (clark.edu)
- Euclid's Elements of Geometry with Greek text, Richard Fitzpatrick
- Theory of Ratios in Euclid’s Elements Book V revisited, Salomon OFMAN, 2014
- For instance, even the mathematician D. Fowler who worked many years on this question had to admit that, even for mathematicians, the ‘Definition 5 (…) as a description, is almost impenetrable (…) though its latent power and scope are enormous.’
- Al Khayyam wrote a complete book critical of Euclid’s Elements, especially of the definition V.5
- For instance, even the mathematician D. Fowler who worked many years on this question had to admit that, even for mathematicians, the ‘Definition 5 (…) as a description, is almost impenetrable (…) though its latent power and scope are enormous.’
- Euclid’s theory of ratios
- The Encyclopaedia Britannica - Vol.11 - 11th ed., 1910. Geometry, p. 682-
- 5. Kitap Home
- Ratio in Early Greek Mathematics, by D. H. FOWLER
- Numbers, Magnitudes, Ratios, and Proportions in Euclid’s Elements: How Did He Handle Them? IVOR GRATTAN-GUINNESS
- THE 1570 BRITISH MULTIPLICATION DEFINITION "to multiply a by integral b is to add a to itself b times" IS WRONG!
- The geometry of numbers in Euclid