1. 1) H. Zhi, “Risk management for overseas construction projects”, International Journal of Projects Managemant, Vol.13, No.14, pp.231-237 (1995)
2. 2) H. Ohtsu, Y. Onoi, T. Omoto, Y. Ohnishi, S. Nisiyama and S. Kinose, “A consideration on the assessment and allocation of geotechnical risk in PFI construction projects”, Journal of JSCE, No.721/VI-57, pp.193-205 (2002)
3. 3) H. Ohtsu, Y. Onoi, Y. Ohnishi, T. Takahashi and T. Tsubokura, “A Study on estimation of the construction cost variation of underground construction projects caused by variation of mechanical properties”, Journal of JSCE, No.756/VI-62, pp.117-129 (2004)
4. 4) H. Ohtsu, K. Sakai and N. Hasegawa, “A study on the methodology of estimating the rock classification with the seismic exploration in mountain tunnel construction projects”, Journal of JSMS, Vol.56, No.9, pp.820-827 (2007)
5. 5) M. Kimura, O. Sugita and Y. Otsuka, “Rock mass evaluation and tunnel construction using data of prior survey based on a scoring method”, JSCE, Tunnel engineering workshop papers and proceedings, Vol.11, pp.87-92 (2001)