1. PLAXIS Manual, version 7;Brinkgreve;Balkema, Roterdam,1998
2. Predictions of ground deformations in shallow tunnels in clays;Chou;Tunnelling and Underground Space Technology,2002
3. Shape of ground surface settlement profiles caused by excavation;Hseih PG;Canadian Geotechnical Journal,1998
4. The investigation of time settlements of soil as a result of drilling shallow tunnels;Jafarpisheh;6th Iranian Tunnel Conference Tehran, p,2003
5. Mair RJ (1998). Geotechnical aspect of design criteria for bored tunnelling in soft ground. World Tunnels Congress 98 On Tunnels and Metropolises, Balkema, Sao Paulo, Brazil, pp.183-199.