Tokio Arai
- An Experimental Study of Multi-circular Face Shield Tunnelling. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1989, n. 406 ( 1989). (1989):
- Development Of Novel Material Shield-cuttable Tunnel-wall System. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1995, n. 522 (septembre 1995). (1995):