Hi,

> Can you recommend papers on monadic programming?
> Or how did you mastered it?

"Mastered" it might be too strong a word... :-)  Anyway, my recommendation
is to simply start using it and let practice do its thing.  (In my case
practice came from developing Ocsigen/Eliom apps).

As for books or tutorials, I would suggest taking a look at material for
learning Haskell.  Recently, some well-publicised Haskell books targeted
at beginners have come out [1,2].  No introduction to Haskell is really
complete without also discussing monads. (Reading Haskell is fairly
straightforward for those familiar with Ocaml, btw).

Cheers,
Dario Teixeira

[1] http://book.realworldhaskell.org/
[2] http://learnyouahaskell.com/