John Barber
- The Achievement of Structural Stability in the Drystone Iron-Age Broch Towers in North Scotland. Vorgetragen bei: Fourth International Congress on Construction History, Paris, 3-7 July 2012. (2012):
- Constructing Drystone Built Iron Age Broch Towers In Scotland: Initiating A Construction History. Vorgetragen bei: Fifth International Construction History Congress, Chicago, 06/2015. (2015):