- Euclid@ (7)
- Biography of Apollonius (262BC-190BC) ...www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Apollonius.html
- Biography of Thales of Miletus (624BC-547BC) ...www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Thales.html
- Biography of Jakob Steiner (1796-1863) ...turnbull.dcs.st-and.ac.uk/history/Mathematicians/Steiner.html