23 May 2016 Rich Hickey
- https://www.infoq.com/news/2016/05/clojure-spec-contract
- http://gigasquidsoftware.com/blog/2016/05/29/one-fish-spec-fish/
- Lambda Island - 7. Intro to clojure.spec
- https://lambdaisland.com/episodes/clojure-spec
23 May 2016 Rich Hickey