Building A Sudoku Solver In Java With Dancing Links | by Sylvain Saurel | Javarevisited | Medium
https://medium.com/javarevisited/building-a-sudoku-solver-in-java-with-dancing-links-180274b0b6c1
Drop millions of allocations by using a linked list (2015) | Hacker News
https://news.ycombinator.com/item?id=26433654
drop millions of allocations by using a linked list by tenderlove · Pull Request #1188 · rubygems/rubygems · GitHub
https://github.com/rubygems/rubygems/pull/1188