1. Three-dimensional analysis of raked group;Beneerjee;Proc., Inst. Civil,1976
2. Excavations and Tunnelling, Chapt. 8 in Soft Clay Engineering;Clough,1981
3. Pile responses due to tunnelling;Chen;ASCE Geotech. J,1999
4. Displacement around soft ground tunnels, General Report: Session IV, Tunnels in Soil;Cording,1975
5. The Heathrow Express trial tunnel;Deane,1995