The Original™ Fibonacci Spiral Clock

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Singh, Pamanand (1985). "The so-called fibonacci numbers in ancient and medieval India". Historia Mathematica. 12 (3): 229–244. doi: 10.1016/0315-0860(85)90021-7. a b Gordon, John Steele. "The Man Behind Modern Math". Archived from the original on 2015-08-23 . Retrieved 2015-08-28. See the incipit of Flos: "Incipit flos Leonardi bigolli pisani..." (quoted in the MS Word document Sources in Recreational Mathematics: An Annotated Bibliography by David Singmaster, 18 March 2004 – emphasis added), in English: "Here starts 'the flower' by Leonardo the wanderer of Pisa..." a b Fibonacci's Liber Abaci, translated by Sigler, Laurence E., Springer-Verlag, 2002, ISBN 0-387-95419-8 Knuth, Donald (2006). The Art of Computer Programming: Generating All Trees – History of Combinatorial Generation; Volume 4. Addison-Wesley. p. 50. ISBN 978-0-321-33570-8. Archived from the original on 2023-03-13 . Retrieved 2020-11-11.

Led strip 4 (leds4 in the arduino sketch) with 9 leds (it is used to light the labeled circles: 12,24,36,48,pm) a b c MacTutor, R. "Leonardo Pisano Fibonacci". www-history.mcs.st-and.ac.uk. Archived from the original on 2019-10-28 . Retrieved 2018-12-22. Goetzmann, William N., Fibonacci and the Financial Revolution (October 23, 2003), Yale School of Management International Center for Finance Working Paper No. 03–28 Led strip 1 (leds1 in the arduino sketch) with 6 leds (it is used to light the square divisions belonging to the values 2 and 3 of the Fibonacci sequence)

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Practica Geometriae (1220), a compendium of techniques in surveying, the measurement and partition of areas and volumes, and other topics in practical geometry (English translation by Barnabas Hughes, Springer, 2008). Grimm, R. E., " The Autobiography of Leonardo Pisano", Fibonacci Quarterly, Vol. 11, No. 1, February 1973, pp. 99–104. The English edition of the Liber abacci was published by L.E. Sigler, Leonardo Pisano's book of calculation, New York, Springer-Verlag, 2003 Fibonacci, Leonardo". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 2021-05-12.

Eves, Howard. An Introduction to the History of Mathematics. Brooks Cole, 1990: ISBN 0-03-029558-0 (6th ed.), p. 261. a b Devlin, Keith. "The Man of Numbers: Fibonacci's Arithmetic Revolution [Excerpt]". Scientific American. Archived from the original on 2014-06-18 . Retrieved 2015-08-29. Led strip 3 (leds3 in the arduino sketch) with 3 leds (it is used to light the square divisions belonging to the value 5 of the Fibonacci sequence) Smith, David Eugene; Karpinski, Louis Charles (1911), The Hindu–Arabic Numerals, Boston and London: Ginn and Company, p. 128, archived from the original on 2023-03-13 , retrieved 2016-03-02 . Drozdyuk, Andriy; Drozdyuk, Denys (2010). Fibonacci, his numbers and his rabbits. Toronto: Choven Pub. p. 18. ISBN 978-0-9866300-1-9. OCLC 813281753. Archived from the original on 2020-02-17 . Retrieved 2020-01-26.

Considerantes nostre civitatis et civium honorem atque profectum, qui eis, tam per doctrinam quam per sedula obsequia discreti et sapientis viri magistri Leonardi Bigolli, in abbacandis estimationibus et rationibus civitatis eiusque officialium et aliis quoties expedit, conferuntur; ut eidem Leonardo, merito dilectionis et gratie, atque scientie sue prerogativa, in recompensationem laboris sui quem substinet in audiendis et consolidandis estimationibus et rationibus supradictis, a Comuni et camerariis publicis, de Comuni et pro Comuni, mercede sive salario suo, annis singulis, libre xx denariorum et amisceria consueta dari debeant (ipseque pisano Comuni et eius officialibus in abbacatione de cetero more solito serviat), presenti constitutione firmamus». F. Bonaini, Memoria unica sincrona di Leonardo Fibonacci, novamente scoperta, «Giornale storico degli archivi toscani» 1, 4, 1857, pp. 239–246. Sloane, N. J. A. (ed.). "Sequence A000045 (Fibonacci Numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.