In Figure Skating, the Quad Jump Is Now Routine - WSJ
Nathan Chen Makes a Comeback With an Unprecedented 6 Quads - The New York Times
Quadruple jump - Wikipedia
Uno favored to take title at Skate America - The Japan Times
Uno lands historic quad flip at Team Challenge - Golden Skate
Yuzuru Hanyu and the quest for the quad axel – DW – 02/09/2022
Japan's Yuzuru Hanyu lands 1st-ever quad loop in competition | CBC Sports
Nathan Chen Makes a Comeback With an Unprecedented 6 Quads - The New York Times
Yuri!!! on ICE: behind Victor's quad fest | HOT CHOCOLATE IN A BOWL
Hanyu Yuzuru becomes the first skater in history to execute quadruple Axel on international stage-Xinhua
Trusova enters Guinness Book of World Records again after quad flip jump
Russian Figure Skater Kamila Valieva Landed Quad Jump at Olympics
The Most Astonishing Jumps You've Seen (or Might See) at This Year's Figure Skating Competitions | Vogue
How Quad Jumps Have Changed Women's Figure Skating | FiveThirtyEight
Russian becomes first woman to land a 'quad' at the Olympics, helps earn gold
Utahn Nathan Chen produces spectacular free skate to win gold at worlds
How Nathan Chen Won Gold in Men's Figure Skating - The New York Times
The quad revolution
What Is A Quad Flip In Ice Skating - Metro League
How Russia's Anna Shcherbakova Won Gold in Women's Figure Skating - The New York Times
2 Russians medal at the Olympic figure skating final, but not Kamila Valieva : NPR
Figure skating star lands quadruple Rittberger jump in training, coach says
Jumping wizards make possibilities seem endless — Globetrotting by Philip Hersh
Quadruple jump - Wikipedia
American Nathan Chen sets record in Olympics figure skating short program - CSMonitor.com
