1. 1) Mizuguchi, S. eds.: Advanced Technology on Industrial Packaging and Transportation, (in Japanese), (2002), 58-94, The fujitechnosystem.
2. 2) Inaba,Y.: Flatbed Diecutting and Maintenance of Diecutter (DSJ′98 Seminar text), CARTONBOX, (in Japanese), 17-200 (1998), 17-20.
3. 3) Anderson, T. L.: Fracture Mechanics (third edition), (2005), 61-69, CRC press.
4. Fracture toughness of paper - development of a test method
5. 5) Nagasawa, S., Fukuzawa, Y., Ymaguchi, T., Murayama, M., Yamaguchi, D. & Katayama, I.: J. Jpn. Soc. Technol. Plast., (in Japanese), 43-498 (2002), 624-628.