Ask HN: Finding a Paper Quoted at FP101x

Visiting https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.72.868&rep=rep1&type=pdf

Gives me an error about a token being required.

That paper was quoted by Erik Meijer in FP101x several years ago.

Do you happen to know the title of such paper or where to find it these days?

In the forum thread in which it was quoted there is only one piece of information about it.

""" It is especially remarkable since, in the Haskell community, monads are still considered as one of the most advanced and difficult features to master """

Please do have a nice day.