Woolliscroft/Hoffmann 2010, S. 230; Breeze 1982; Breeze/Woolliscroft: Signalling and the design of the Roman Gask Ridge system. In: Proceedings of the Society of Antiquaries of Scotland. 123, 1993, S. 291–293 (online).
Pitts/St. Joseph 1985, S. 44; Rivet 1964, S. 196–198, nach David. J. Woolliscroft; Birgitta Hoffmann: The Roman Gask Project: Annual Report 2010 (PDF; 14 MB). In: Roman Gask Project.