1. Peck, R.B., Deep Excavations and Tunneling in Soft Ground, Proc. 7th Int. Conf. Soil Mechanics & Foundation Engineering, State of the Art Volume, Mexico City, 1969, pp. 225–290.
2. Cording, E.J. and Hansmire, W.H., Deflections around Soft Ground Tunnels, General Rep. 5th Pan American Conf. Soil Mech. and Found. Engineering, 1975, session IV, pp. 571–632.
3. Clough, G.W. and Schmidt, B., Design and Performance of Excavations and Tunnels in Soft Clay, Soft Clay Engineering, 1981, pp. 569–634.
4. O’Reilly, M.P. and New, B.M., Settlements above Tunnels in the UK: Their Magnitude and Prediction, Proceedings of Tunneling Symposium, London, 1982, pp. 173–181.
5. Attewell, P.B. and Woodman, J.P., Predicting the Dynamics of Ground Settlement and its Derivatives Caused by Tunneling in Soil, Ground Engineering, 1982, vol. 15, no. 8, pp. 13–22.