Below are just a few examples of articles written by scholars about alternate history:
Counterfactuals and revisionism in historical explanation
Fact, Fiction, Fascism: Testimony and Mimesis in Holocaust Narratives
How is the Past Related to the Future?
Turning Points, Bottlenecks, and the Fallacies of Counterfactual History
'What If ?' and Beyond: Counterfactual History in Literature
Below are places to look for scholarly articles about alternate history. You may discover that perspectives vary by discipline, i.e. history, literature, the social sciences, etc.