1. Akagi, T., Ichikawa, Y., Kuroda, T., Kawamoto, T. (1984): A non-linear rheological analysis of deeply located tunnels. Int. J. Num. Anal. Meth. Geomech. 8, 107?120.
2. Aydan, Ö., Akagi, T., Ito, T., Kawamoto, T. (1992): Prediction of behaviour of tunnels in squeezing ground. J. Geotechn. Engng. JSCE, 448 (III?19), 73?82.
3. Aydan Ö., Akagi, T., Kawamoto, T. (1993a): Theoretical and numerical modelling of swelling phenomenon of rocks in tunnel excavations. In: Proc., 2nd Asian-Pacific Conference on Computational Mechanics, Sydney, 331?336.
4. Aydan Ö., Akagi, T., Kawamoto, T. (1993b): The squeezing potential of rocks around tunnels; Theory and prediction. Rock Mech. Rock Engng. 26(2), 137?163.
5. Aydan, Ö., Ito, T., Akagi, T., Kawamoto, T. (1994): Theoretical and numerical modelling of swelling phenomenon of rocks in rock excavations. In: Proc., Computer Methods and Advances in Geomechanics 3, Morgantown, 2215?2220.