@ -494,7 +494,7 @@ Didn't know where else to put these:
## Parametricity, ad-hoc vs. parametric polymorphism, free theorems
- http://dl.dropboxusercontent.com/u/7810909/media/doc/parametricity.pdf
- https://github.com/tonymorris/scalaz-history/blob/master/slides/parametricity.tex
- https://github.com/tonymorris/parametricity/