Mamoru Nagai
- A Method To Estimate The Nunber Of Visitors In The Recreational Area. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1985, n. 353 (janvier 1985). (1985):
- Division of Regional Planning Department of Civil Engineering Utsunomiya University. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1991, n. 431 (juillet 1991). (1991):
- A Study On The Trip Survey In The Tourist Destination. Dans: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1999, n. 625 (juillet 1999). (1999):