References:

Levin, Eddy, The golden mean gauge, Order at 42 Harley Street, London, W1N 1AB, or mail to eddylevin@goldenmeangauge.co.uk.

Markowsky, George (1992) Misconceptions about the Golden Ratio, The College Mathematics Journal, Vol. 23, No.1 [January], 2-19.
Nagy, Dénes (1996-97) Golden section(ism): From mathematics to the theory of art and musicology, Part 1 and Part 2, Symmetry: Culture and Science, Vol. 7 (1996), No. 4, 413-441 and Vol. 8 (1997), No. 1, 74-112; cf., the additional note, Symmetry: Art and Science, New Series, 2002, Nos. 1-4, 57.
Néroman, D. (1983) Le Nombre d' Or, à la portée de tous, Paris [Rue Racine 19]: Ariane.
Web sites:
http://www.nexusjournal.com/BouMaz.html
http://www.lengthening.ukrpack.net/
http://goldennumber.net/theology.htm ;
http://www.summum.us/pyramid/