Igawa, O. , Kouchiwa, H. , Ito, Y. (2014), 'Sewer Culvert Installation Method to Accommodate Underground Construction in an Urban Area with Narrow Streets (The Development of Shield Switching Type Micro-Tunneling Method and the Introduction of Construction Examples)', World Academy of Science, Engineering and Technology, Open Science Index 85, International Journal of Civil and Environmental Engineering, 8(1), 1 - 6.