Watch: Feliks Zemdegs breaks Rubik's cube world record - UPI.com
Rubiks Cube World Record Broken After Just 5 Weeks With Stunning 4.373 Time From Feliks Zemdegs « Puzzles :: WonderHowTo
3×3×3 pro speed cube: The Valk 3 – Maths Gear - Mathematical curiosities, games and gifts
Mats Valk - Speedcuber - Exactly 10 years ago, a few minutes before 2 PM on November 24, 2007, I competed in my first Rubik's cube competition! An average of 1 minute
Rubik's Cube World Record Just Set at 4.74 Seconds
Mats Valk competes in the 2019 Rubik's cube World Championships | Xomnia