Applicative functors (Solutions)| en.wikibooks.org
The Functor class| en.wikibooks.org
Slides and videos explaining a functional approach to error handling| fsharpforfunandprofit.com
Dr Frankenfunctor and the Monadster, part 2| fsharpforfunandprofit.com
Or, how a 19th century scientist nearly invented the state monad| fsharpforfunandprofit.com
“A ‘newbie’, in Haskell, is someone who hasn’t yet implemented a compiler. They’ve only written a monad tutorial” - Pseudonymn| fsharpforfunandprofit.com