1. Brinkgreve, R.B.J., Broere, W., Waterman, D., 2005. Plaxis 3D-Tunnel, version 2. Delft University of Technology and Plaxis B.V., the Netherlands.
2. Brinkgreve, R.B.J., Vermer, P.A., 1998. Plaxis, Finite Element Code for Soil and Rock Analyses. A.A. Balkema, Rotterdam, Broodfield.
3. Chen, S.L., Lee, S.C., Gui, M.W., 2009. Effects of rock pillar width on the excavation behavior of parallel tunnels. Tunnelling and Underground Space Technology, 24(2):148–154. [doi:10.1016/j.tust.2008.05.006]
4. Georgiadis, K., Potts, D.M., Zdravkovic, L., 2004. Modelling the shear strength of soils in the general stress space. Computers and Geotechnics, 31(5):357–364. [doi:10.1016/j.compgeo.2004.05.002]
5. Hakala, M., Tolppanen, P., 2003. Analyses of Tunnel Stress Failures at Pyhäsalmi Mine. ISRM-Technology Roadmap for Rock Mechanics, South African Institute of Mining and Metallurgy, p.461–464.