Löfflmann, Georg. «Competing Visions for America – Popular Discourses of Grand Strategy on the New York Times Best-Sellers List». A: American Grand Strategy under Obama. Edinburgh University Press, 18 gener 2018. DOI10.3366/edinburgh/9781474419765.003.0004. ISBN 9781474419765.
Allentuck, Danielle «Simone Biles Set a New Standard. Can U.S.A. Gymnastics Do the Same?» (en anglès). The New York Times, 12-08-2019. Arxivat de l'original el 12 agost 2019. ISSN: 0362-4331 [Consulta: 25 juliol 2021]. «Her winning performance included two skills never executed successfully before in women’s gymnastics competition: a triple-double (two flips with three twists) on floor exercise and a double-double dismount (two flips with two twists) on balance beam.»
Allentuck, Danielle «Simone Biles Set a New Standard. Can U.S.A. Gymnastics Do the Same?» (en anglès). The New York Times, 12-08-2019. Arxivat de l'original el 12 agost 2019. ISSN: 0362-4331 [Consulta: 25 juliol 2021]. «Her winning performance included two skills never executed successfully before in women’s gymnastics competition: a triple-double (two flips with three twists) on floor exercise and a double-double dismount (two flips with two twists) on balance beam.»
Allentuck, Danielle «Simone Biles Set a New Standard. Can U.S.A. Gymnastics Do the Same?» (en anglès). The New York Times, 12-08-2019. Arxivat de l'original el 12 agost 2019. ISSN: 0362-4331 [Consulta: 25 juliol 2021]. «Her winning performance included two skills never executed successfully before in women’s gymnastics competition: a triple-double (two flips with three twists) on floor exercise and a double-double dismount (two flips with two twists) on balance beam.»
