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2. Ground settlement above shield driven tunnels in clay;Attewell;Tunnels and Tunneling,1975
3. Barratt, D.A., Tyler, R.G., 1976. Measurements of Ground Movements and Lining Behavior on the London Underground at Regent's Park. Transport and Road Research Laboratory Report LR684, UK.
4. Results of a program of instrumentation involving a precast segmented concrete-lined tunnel in clay;Belshaw;Can. Geotech. J.,1978
5. Deformations and pore pressures in the vicinity of a precast, segmented, concrete-lined tunnel in clay;Belshaw;Can. Geotech. J.,1979