All of the articles are pre-publication versions, which means that there may have been some edits/alterations/corrections in the versions that were later published.
I can't claim any of these pieces to be highly academic, since I much prefer to write in plain English for a general reader. If you're looking for high theory, you've come to the wrong place. I'm probably most happy with the more recent articles, but the two pieces on Ray Bradbury and BBC radio show the best bits of original research.