Quadruple jump - Wikipedia
Quadruple Toe Loop Yuzuru Hanyu - YouTube
Hanyu's quad loop adds to Japan's skating legacy - The Japan Times
Hanyu becomes first figure skater to achieve clean quad loop in official ISU competition
FIGURE SKATING | Yuzuru Hanyu Claims Sixth Japan Title, Nearly Lands Historic Quadruple Axel | JAPAN Forward
First woman to land quad at Games, Kamila Valieva fulfills dream of glory - The Japan Times
What Is a Quad in Figure Skating? Kamila Valieva's Historic Jumps at Beijing Olympics – NBC New York
Malinin's quad axel lifts 17-year-old to Skate America title | AP News
Quadruple jump - Wikipedia
Kamila Valieva makes Olympic history with quadruple jumps - The Washington Post
Hanyu lands four quadruple jumps and wins World Championships – Waseda University
Kamila Valieva's historic quadruple jump seals team figure skating gold | Winter Olympics Beijing 2022 | The Guardian
US Figure Skater Ilia Malinin Lands Quad Axel to Take Lead at Grand Prix Finals in Beijing
Jumping wizards make possibilities seem endless — Globetrotting by Philip Hersh
Figure skating star lands quadruple Rittberger jump in training, coach says
Kamila Valieva completes successful quad jump at Winter Olympics in Beijing | 11alive.com
Yuzuru Hanyu's Quad Loop Collection - YouTube
Yuzuru Hanyu didn't land the first ever quadruple axel at the Olympics, but Twitter still loves him | Mashable
Hanyu Yuzuru becomes the first skater in history to execute quadruple Axel on international stage-Xinhua
Quadruple Loop Nathan Chen - YouTube
What's the difference between a toe loop, an axel, and a lutz? - Quora
How the Quad Jump Is Changing Women's Figure Skating - The New York Times
A quadruple Axel in competition? “Not anytime soon” for world champion Nathan Chen - Olympic News
How Quad Jumps Have Changed Women's Figure Skating | FiveThirtyEight
