1. Lower bound limit analysis using non-linear programming;Lyamin;Int J Numer Meth Eng,2002
2. A new discontinuous upper bound limit analysis formulation;Krabbenhøft;Int J Numer Meth Eng,2005
3. Cairncross AM. Deformation around model tunnels in stiff clay. PhD thesis. University of Cambridge; 1973.
4. Atkinson JH, Cairncross AM. Collapse of a shallow tunnel in a Mohr-Coulomb material. In: Role of plasticity in soil mechanics, Cambridge; 1973. p. 202–06.
5. Mair RJ. Centrifugal modelling of tunnel construction in soft clay. PhD thesis. University of Cambridge; 1979.