Purely Functional Data Structures in Elm – course lecture notes (2015) - https://news.ycombinator.com/item?id=12145741 - July 2016 (15 comments)

What's new in purely functional data structures since Okasaki? (2010) - https://news.ycombinator.com/item?id=11056704 - Feb 2016 (42 comments)

Purely Functional Data Structures (1996) [pdf] - https://news.ycombinator.com/item?id=10486481 - Nov 2015 (13 comments)

Okasaki: Purely Functional Data Structures (1996) [pdf] - https://news.ycombinator.com/item?id=8327838 - Sept 2014 (1 comment)

What's new in purely functional data structures since Okasaki? (2010) - https://news.ycombinator.com/item?id=7081191 - Jan 2014 (17 comments)

Ten Years of Purely Functional Data Structures (2008) - https://news.ycombinator.com/item?id=5701396 - May 2013 (24 comments)

What's new in purely functional data structures since Okasaki? - https://news.ycombinator.com/item?id=1983461 - Dec 2010 (2 comments)

What's new in purely functional data structures since Okasaki - https://news.ycombinator.com/item?id=1713594 - Sept 2010 (1 comment)

"Purely Functional Data Structures" by Chris Okasaki [pdf] - https://news.ycombinator.com/item?id=1138979 - Feb 2010 (12 comments)

Teaching, Playing, and Programming: Ten Years of Purely Functional Data Structures - https://news.ycombinator.com/item?id=112270 - Feb 2008 (2 comments)

Chris Okasaki's PhD thesis on purely functional data structures (pdf) - https://news.ycombinator.com/item?id=8221 - April 2007 (1 comment)