Atkinson, J.H., Fookes, P.G., Miglio, B.F., 2003. Destructuring and disaggregation of Mercia Mudstone during full-face
tunneling. Quarterly Journal of Engineering Geology and Hydrogeology, 36: 293-303.
Duncan, J.M., 2000. Factors of Safety and Reliability in Geotechnical Engineering. Journal of Geotechnical and
Geoenvironmental Engineering; 126(4): 307-316.
Fernández-Steeger, T. M., Post, C., Feinendegen, M., Bäppler, K., Zwick, O., Azzam, R., Ziegler, M., Stanjek, H.,
Peschard, A., Pralle, N., 2008. Interfacial processes between mineral and tool surfaces – causes, problems and solution in
mechanical tunnel driving.Geotechnologien Science Report, 12: 46-57.
Geodata, S .P .A., 1995. Review of alternative construction methods and feasibility of proposed methods for constructing
Attiko Metro Extension of Line 3 to Egaleo: Attiko Metro S. A., 191–193.
Gill, D.E., Corthesy, R., Leite, M.H., 2005.Determining the minimal number of specimens for laboratory testing of rock
properties.Engineering Geology; 78: 29–51.
Kooistra, A., 1998. Verkleving van klei in tunnel boor machines.Memoirs of the Centre of Engineering Geology in the
Netherlands, 165, Delft.
Sass, I., Barbaum, U., 2009.A method for assessing adhesion of clays to tunneling machines. Bull. Eng. Geol. Environ.68:
27-34
Thewes, M., 1999. Adha¨sion von onbo¨denbeimTunnel vortriebmit Flu¨ ssigkeitsschiden. Berichteaus Grundbau und
Bodenmechanik der BergischenUniversita¨tGesamthochschule Wuppertal, Fachbereich Bauingenieurwesen, Band 21,
Wuppertal 1999, Shaker Verlag Aachen.
Thewes, M., Burger, W., 2004. Clogging risks for TBM drives in clay, Tunnels & Tunnelling International. 28–31.
Thewes, M., Burger, W., 2005. Clogging of TBM drives in clay- identification and mitigation of risks, Underground space
use: Analysis of the past and lessons for the future, 1-2.