1. BULMAN O. M. B. 1947. A Monograph of the Caradoc (Balclatchie) Graptolites from Limestones in Laggan Burn, Ayrshire. Part 3. Monograph of the Palaeontological Society, London, 59–78.
2. Some new diplograptids from the Llandovery of Britain and Scandinavia;BULMAN;Palaeontology,1968
3. COOPER R. A. 1979. Ordovician Geology and Graptolite Faunas of the Aorangi Mine Area, North-west Nelson, New Zealand. New Zealand Geological Survey Paleontological Bulletin, 47.
4. FORTEY R. A. HARPER D. A. T. INGHAM J. K. OWEN A. W. RUSHTON A. W. A. WOODCOCK N. P. 2000. A Revised Correlation of Ordovician Rocks in the British Isles. Special Report of the Geological Society of London, 24.
5. Victorian graptolites (new series). Part III;HARRIS;Proceedings of the Royal Society of Victoria,1935