11) Mothersille, DKV, 1989: The influence of close proximity blasting on the performance of resin bonded rock bolts. PhD Thesis. University of Bradford .
12) ICE, A National Agenda: Long-term and Fundamental Research, Institution of Civil Engineers, Thomas Telford, London 1992.
13) British Standard Code for Ground Anchorages (BS 8081: 1989). British Standards Institution 1992.
14) Ifeachor, E, Jervis, B: Digital Signal Processing: A Practical Approach, Addison-Wesley Publishers Limited, 1993.
15) Rodger et al, 1993: Dynamic response of rock bolt systems at Pen y Clip Tunnel in North Wales . Options for Tunnelling 1993. Developments in Geotechnical Engineering. 74: 719-727. Amsterdam : Elsevier.
