Chinese Nine Linked Rings Puzzle - ChinesePuzzles.org
Amazon.com: KAILIMENG 5 Linked Rings Metal Puzzle - Hard Sequential Movement Puzzle - Brain Teasers Mind Game for Adults and Kids - Classical Trick IQ Toy (Length 4.5 Inches) : Toys & Games
Recursive interlocking puzzles
Mechanical puzzle - Wikipedia
PuzLock - Interlocking Printable 3D Puzzles - YouTube
Recursive interlocking puzzles
Computational design of twisty joints and puzzles | ACM Transactions on Graphics
Recursive Interlocking Puzzles (SIGGRAPH Asia 2012) - YouTube