# Reference

1. [Promises Are Made to Be Broken: Migrating R to Strict Semantics](http://aviral.io/static/pdfs/promises-are-made-to-be-broken.pdf)
1. [Call-by-Need Is Clairvoyant Call-by-Value](http://www.cs.nott.ac.uk/~pszgmh/clairvoyant.pdf)