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2. Conodonts from the Shinnel Formation, Tweeddale Member (middle Ordovician), Southern Uplands, Scotland;ARMSTRONG;Palaeontology,1997
3. Conodont micropalaeontology of mid-Ordovician aged limestone clasts from Lower Old Red Sandstone conglomerates, Lanark and Strathmore basins, Midland Valley, Scotland
4. ARMSTRONG, H. A. & DEAN, M. T. 1996. Conodonts from Ruddenleys, Lamancha and Crawford, Southern Uplands, Scotland. British Geological Survey Technical Report, WH/96/192R.
5. Terrane evolution of the paratectonic Caledonides of northern Britain