And where are they saying/showing it?
--scholarly journals (search for specific titles owned at Hamline)
--conference proceedings Search WikiCFP for conference papers, to discover conferences such as, Persuasive 2018
--academic texts (dissertations, books, book chapters)
Scholars publish/post in popular media, too!
Remember, each discipline determines the definitions of scholarly, popular and trade press. What is accepted in one discipline, may be classified differently in another.