1. Adams, H. F. 1967. The Seams of the South Wales Coalfield. The Institution of Mining Engineers, London.
2. Displacement geometry in the volume containing a single normal fault;Barnett;Bulletin of the American Association of Petroleum Geologists,1987
3. A late Cenozoic regional mesofracture system in southern England and northern France
4. Coalbed methane migration in and around fault zones;Boardman,1997
5. Bustin, R. M. , Cameron, A. R. , Grieve, D. A. & Kalkreuth, W. D. 1983. Coal Petrology, its principles, methods and applications. Geological Association of Canada Short Course Notes Volume 3, Victoria; British Columbia.