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What are the advantages and disadvantages of using the knuckleball as a primary pitch in baseball? - Quora
How hard is it to hit a knuckleball? Why does it move less than other pitches? - Quora
How does a Knuckleball Work? The Science of the Knuckleball
Aerodynamics of knuckle ball: Flow-structure interaction problem on a pitched baseball without spin - ScienceDirect
Predicting a Baseball's Path
Comparison of baseball and cricket - Wikipedia
Aerodynamics of knuckle ball: Flow-structure interaction problem on a pitched baseball without spin - ScienceDirect
How to Throw Curveball. An Introduction to the Art of the…, by Brent Pourciau
Applied Sciences, Free Full-Text
PDF) Physics of knuckleballs
Applied Sciences, Free Full-Text
Sungchan Hong's research works University of Tsukuba, Tsukuba and other places