Quadruple Toe Loop Yuzuru Hanyu - YouTube
How Quad Jumps Have Changed Women's Figure Skating | FiveThirtyEight
Yuzuru Hanyu didn't land the first ever quadruple axel at the Olympics, but Twitter still loves him | Mashable
Malinin's quad axel lifts 17-year-old to Skate America title | AP News
Hanyu lands four quadruple jumps and wins World Championships – Waseda University
Quadruple Loop Nathan Chen - YouTube
Women's Skating Quad Jumps History: Surya Bonaly Tried to Do It 30 Years Ago | TIME
How Olympic Figure Skaters Break Records with Physics | Scientific American
Are quintuple jumps in figure skating possible? “Quints” physiology and physics, and what matters in the sport.
Kamila Valieva makes Olympic history with quadruple jumps - The Washington Post
Figure skating: Hurting Hanyu to avoid quad loop at Autumn Classic
US teen skater becomes 1st to land all six quads - Taipei Times
How the Quad Jump Is Changing Women's Figure Skating - The New York Times
Hanyu becomes first figure skater to achieve clean quad loop in official ISU competition
American Nathan Chen sets record in Olympics figure skating short program - CSMonitor.com
Nathan Chen Made History With 6 Quad Jumps. What's That? | TIME
How Quad Jumps Have Changed Women's Figure Skating | FiveThirtyEight
What Is a Quad in Figure Skating? Kamila Valieva's Historic Jumps at Beijing Olympics – NBC New York
How Quad Jumps Have Changed Women's Figure Skating | FiveThirtyEight
How the Quad Jump Is Changing Women's Figure Skating - The New York Times
Quadruple jump - Wikipedia
FIGURE SKATING | Yuzuru Hanyu Claims Sixth Japan Title, Nearly Lands Historic Quadruple Axel | JAPAN Forward
US figure skater Ilia Malinin lands 1st quad axel in competition
