1. Photographs of Edouard Lucas and Jacques Binet at http://www-groups.dcs.st-and.ac.uk/~history/PictDisplay/Lucas.html from The MacTutor History of Mathematics Archive http://www-groups.dcs.st-and.ac.uk/~history/index.html, John O'Connor, joc@st-andrews.ac.uk, August 1999. Email message. (Photo is not permitted for reproduction in hard-copy. The person who gave permission is not the owner of the copyright but it is probably in the public domain. Read a more lengthy explanation.)
   
2. Photograph of Towers of Hanoi puzzle at http://cedar.evansville.edu/~ck6/bstud/lucas.html from Clark Kimberling Home Page http://cedar.evansville.edu/~ck6/index.html, Deborah J. Hwang, dh27@evansville.edu, August 1999. Email message.
   

References

1. Blackman, Meredith "The Fibonacci Series" The Golden Ratio. 1998 (July 1999)
   
2. Harden, Mark "Leonardo da Vinci" The Artchive. (July 1999)
   
3. Hendrich, Kay L. Photograph of The Leaning Tower of Pisa. Lycos Image Gallery. (May 1999) (More information.)
4. Hildebrant, Paul "The Golden Section and Fibonacci Sequence" Deep Zome. 1999 (June 1999)
   
5. Kimberling, Clark "Edouard Lucas (1842-1891) number-theorist" Clark Kimberling Home Page (August 1998)
   
6. Knott, Ron "The Fibonacci Numbers and the Golden Section in Nature" Fibonacci Numbers and the Golden Section. 1996 (March 1999).
   
7. Knott, Ron "The Mathematics of the Fibonacci Series" Fibonacci Numbers and the Golden Section. 1996 (March 1999).
   
8. Knott, Ron "The Golden section ratio: Phi" Fibonacci Numbers and the Golden Section. 1996 (March 1999).
   
9. Johnson, Frank. Photograph of a statue of Leonardo Fibonacci. Clark Kimberling Home Page. 1978.
   
10. O'Connor, John and Edmund F. Robertson "Francois Edouard Anatole Lucas." The MacTutor History of Mathematics Archive. 1996 (August 1998)
    
11. O'Connor, John and Edmund F. Robertson "Jacques Philippe Marie Binet." The MacTutor History of Mathematics Archive. 1997 (August 1998)
    
12. O'Connor, John and Edmund F. Robertson "Jordanus Nemorarius." The MacTutor History of Mathematics Archive. 1997 (August 1998)
    
13. O'Connor, John and Edmund F. Robertson "Leonardo Pisano Fibonacci." The MacTutor History of Mathematics Archive. 1998 (August 1998)
    
14. Stewart, Ian. "Daisy, Daisy, Give Me Your Answer, Do." Scientific American, January 1995, pp.96-99.
    
15. Stewart, Ian. "Fibonacci Forgeries." Scientific American, May 1995, pp.102-105.
    
16. Wiedman, K. "A Little Math about the Golden Mean" The Golden Mean. 1992 (June 1999).