1. Panet, M. and A. Guenot, “Analysis of convergence behind the face of a tunnel, Tunnelling”. The Institution of Mining and Metallurgy, pp 197 – 204, 1982.
2. Conrad W. Felice, „Tunneling Short Course“ September 12-15, 2016 Boulder, Colorado.
3. Evert Hoek, „Tunnels in weak rock“ Rocscience (1998).
4. C. Jeremy Hung, James Monsees, Nasri Munfah, John Wisniewski, “Technical Manual for Design and Construction of Road Tunnels — Civil Elements” (2009).
5. RS2 (PHASE2) 9.0 Tutorials, Rocscience Inc., Toronto, Canada.
6. Carranza-Torres, C,”Application of the Convergence-Confinement Method of Tunnel Design to Rock Masses That Satisfy the Hoek- Brown Failure Criterion”. Tunnelling and Underground Space Technology, Vol. 15, No. 2, pp. 187-213, 2000.