Takakuni Happo
- Newly Invented Method Of Switching The Existing Track To The New One Right Under In The Urban Area. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1991, n. 435 (September 1991). (1991):
- Newly Invented Method Of Switching The Existing Track To The New One Right Under In The Urban Area And Its Application To The Elevated Track. In: 土木学会論文集 (Doboku Gakkai rombunshū), v. 1994, n. 498 (September 1994). (1994):