1. R. L., Austin and A. C., Higgins: IntroductionIn: (Eds), A stratigraphical index of conodontsEllis Horwood Ltd, Chichester, 13–31., 1985.
2. J., Bouckaert and A. C., Higgins: La base du Namurien dans le Bassin de Dinant, Bulletin de la Société Belge de Géologie, Paléontologie, Hydrologie, 72, 1-17, 1970a.
3. J., Bouckaert and A. C., Higgins: The position of the Mississippian–Pennsylvanian boundary in the Namurian of Belgium, Congres et Colloques l’Universite de Liege, 55, 197-204, 1970b.
4. R. D., Burnett, A. C., Higgins and R. L., Austin: Carboniferous–Devonian conodont CIA in England, Wales and ScotlandThe pattern and its interpretation: a synoptic reviewIn: (Eds), Willi Ziegler Festschrift ICourier Forschunginstitut Senckenberg, 168: 267–280., 1994.
5. C. C., Ebdon, A. J., Fraser, A. C., Higgins, B. C., Mitchener and A. R. E., Strank: The Dinantian stratigraphy of the East Midlands: a seismographic approach, Journal of the Geological Society, London, 147, 519-536, 1990.