Synthesis of 3D jigsaw puzzles over freeform 2-manifolds - ScienceDirect
Recursive Interlocking Puzzles (SIGGRAPH Asia 2012) - YouTube
Recursive Interlocking Puzzles
Recursive Interlocking Puzzles (SIGGRAPH Asia 2012) - YouTube
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