Most of the references in this article are from decades ago. It feels like denotational semantics has not become the success is claimed to be. I studied the book: 'The Denotational Description of Programming Languages: An Introduction' by Michael J. C. Gordon from 1979 while studying computer science in the eighties.
I took a Denotational Semantics course in college in the 80's. I was completely lost, despite going to class every day and trying to understand what they were teaching.
I got a 37% on the mid-term and thought "holy f, this is a class I am not going to pass, wtf is going on?"
I went to the prof during office hours, explained I'm confused, he asked to see my mid-term and exclaimed "Hey, you got the highest score!"
To this day I can still see the gray skinny little textbook with the title "Denotational Semantics" and I still wonder "what the heck was that course about?"
One of the references in the article, is a reference to the book: 'Denotational Semantics: A Methodology for Language Development' https://www.scss.tcd.ie/Andrew.Butterfield/Teaching/CS4003/D...