1. Trigonometric delights;Maor,2002
2. Proportion: science, philosophy, architecture;Padovan,1999
3. Similar figures, space, and solids : being a new geometry of the subject-matter of Euclid, Books V., VI., and XI;Euclid,1926
4. Elementary number theory in nine chapters;Tattersall,2005
5. Divine proportion: phi in art, nature, and science;Hemenway,2005