Explore how regulation of natural monopolies has changed over time. “Regulation of natural monopoly 1”

I want to explore how regulation of natural monopolies has changed over time. “Regulation of natural monopoly 1” and the references to other papers in it should give you the bulk of the references needed. I’ve also submitted “The myth of natural monopoly” which has an Austrian school of economics view on natural monopolies and so I believe it would be good to have an opposing view. However, i do not want this to be the main basis of the lit review, just more of an insight to disagreement in the economic community.