Guthery, Scott B. (2011). "1. The Mediant". A Motif of Mathematics: History and Application of the Mediant and the Farey Sequence. Boston: Docent Press. p. 7. ISBN978-1-4538-1057-6. OCLC1031694495. Retrieved 28 September 2020.
Blake, Jean A. (1966). "Some Characteristic Properties of the Farey Series". The American Mathematical Monthly. 73 (1): 50–52. doi:10.2307/2313922. JSTOR2313922.
Blake, Jean A. (1966). "Some Characteristic Properties of the Farey Series". The American Mathematical Monthly. 73 (1): 50–52. doi:10.2307/2313922. JSTOR2313922.
Guthery, Scott B. (2011). "1. The Mediant". A Motif of Mathematics: History and Application of the Mediant and the Farey Sequence. Boston: Docent Press. p. 7. ISBN978-1-4538-1057-6. OCLC1031694495. Retrieved 28 September 2020.