Extract from Graziella Federici Vescovini's presentation at a conference on the relationship between architecture and mathematics.
http://www.leonet.it/culture/nexus/98/Vescovini.html
Article by Andrey V. Smirnov. Available in English and Russian. [Philosophy East & West] (January, 1993)
http://www.iph.ras.ru/~orient/eng/pube/nciae.htm