1. W.J. Moore, Physical Chemistry, 4th edn. (Prentice-Hall, Englewood Cliffs, New Jersey, 1972)
2. Y. Hirata, Basics of Barrier Film, Electric Journal 469th Technical Seminar Presentation Materials (in Japanese)
3. L. Nielsen, Models for the permeability of filled polymer systems. J. Macromol. Sci. (Chem.) A1 5, 929–942 (1967)
4. Y. Hirata, in 3rd Clayteam Seminar, September 10th, Tokyo (2010)
5. D. Hara, Tosoh Kenkyu·Gijyutsu Hokoku 27, 39–44 (2013) (in Japanese)