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http://mythagogia.blogspot.gr/2017/02/blog-post_19.html
http://www.irem.univ-mrs.fr/expo2013/english/Reperer-A1-pytheas-en.pdf
http://mythagogia.blogspot.gr/2017/02/blog-post_19.html
http://www.irem.univ-mrs.fr/expo2013/english/Reperer-A1-pytheas-en.pdf
https://www.astro.noa.gr/gr/eratosthenes/history.html
http://www.hellinon.net/Eratosthenis.htm
http://www.mixanitouxronou.gr/pos-ena-pigadi-voithise-ton-eratostheni-na-ipostirixi-protos-oti-i-gi-ine-strongili-to-entiposiako-pirama-pou-ekane-o-ellinas-mathimatikos-me-dio-ravdia-se-dio-diaforetikes-polis-ke-ipologise-tin-pe/
http://www.hellinon.net/Eratosthenis.htm
http://www.mixanitouxronou.gr/pos-ena-pigadi-voithise-ton-eratostheni-na-ipostirixi-protos-oti-i-gi-ine-strongili-to-entiposiako-pirama-pou-ekane-o-ellinas-mathimatikos-me-dio-ravdia-se-dio-diaforetikes-polis-ke-ipologise-tin-pe/
http://www.astro.auth.gr/~mplionis/APOSTASEIS_2a.pdf
http://www.noesis.edu.gr/aet/thematic_areas/p486.html
http://www.noesis.edu.gr/aet/thematic_areas/p486.html