Kalesmaki, Joel (18 November 2006). "Types of Greek Numerology". Theology of Arithmetic. Archived from the original on 14 May 2009. Retrieved 26 June 2009.
Kalesmaki, Joel (18 November 2006). "Types of Greek Numerology". Theology of Arithmetic. Archived from the original on 14 May 2009. Retrieved 26 June 2009.