Fink, Karl; Beman, Wooster Woodruff; Smith, David Eugene: A Brief History of Mathematics: An Authorized Translation of Dr. Karl Fink's Geschichte der Elementar-Mathematik. 2nd ed. painos. Chicago: Open Court Publishing Co, 1903. Teoksen verkkoversio.
Markowsky, George: Misconceptions about the Golden Ratio. College Mathematics Journal, 1992, 23. vsk, nro 1, s. 2–19. Mathematical Association of America. doi:10.2307/2686193JSTOR:2686193Artikkelin verkkoversio. (PDF)
jstor.org
Markowsky, George: Misconceptions about the Golden Ratio. College Mathematics Journal, 1992, 23. vsk, nro 1, s. 2–19. Mathematical Association of America. doi:10.2307/2686193JSTOR:2686193Artikkelin verkkoversio. (PDF)
maine.edu
umcs.maine.edu
Markowsky, George: Misconceptions about the Golden Ratio. College Mathematics Journal, 1992, 23. vsk, nro 1, s. 2–19. Mathematical Association of America. doi:10.2307/2686193JSTOR:2686193Artikkelin verkkoversio. (PDF)