1. S. Guggenheim, R. Martin, Definition of clay and clay mineral: joint report of the AIPEA Nomenclature and CMS Nomenclature Committees. Clays Clay Miner. 43, 255–256 (1995)
2. T. Ebina, Development and application of clay film claist, in Understanding Environmental Symbiotic Chemistry Green & Sustainable Chemistry (Hakujitsu-sha, 2010), p. 326 (in Japanese)
3. S. Uehara, The Clay Science Society of Japan Webpage [Online] (in Japanese), http://www.cssj2.org/seminar1/section01/text.html
4. The Clay Science Society of Japan, Clay Handbook, 3rd ed. (2009), p. 7 (in Japanese)
5. K. Brauner, A. Dreisinger, Struktur und Entschung Des Sepioliths. Tschermaks. Miner. Petro. Mitt. 6, 120–140 (1956)