1. Hoek, E.; Marinos, P.: Predicting tunnel squeezing problems in weak heterogeneous rock masses. Tunnels Tunn. Int. Part 1–2, 1–20 (2000)
2. Majumder, D.; Viladkar, M.N.; Singh, M.: A multiple-graph technique for preliminary assessment of ground conditions for tunneling. Int. J. Rock Mech. Min. Sci. 100, 278–286 (2017). https://doi.org/10.1016/j.ijrmms.2017.10.010
3. Singh, M.; Singh, B.; Choudhari, J.: Critical strain and squeezing of rock mass in tunnels. Tunn. Undergr. Sp. Technol. 22, 343–350 (2007). https://doi.org/10.1016/j.tust.2006.06.005
4. Dwivedi, R.D.: Behaviour of Underground Excavations in Squeezing Ground Conditions. IIT Roorkee, London (2014)
5. Goel, R.K.; Jethwa, J.L.; Paithankar, A.G.: An empirical approach for predicting ground condition for runnelling and its practical benefits. In: University of Nevada (ed) The 35th U.S. Symposium on Rock Mechanics (USRMS), Reno, Nevada, pp. 431–35 (1995)