1. Recycle of surplus soil issued from road repairing and crushed stone plant;Tanaka;Inorg. Mater.,1997
2. Synthesis of crystalline zeolite-13X from waste porcelain using alkali fusion;Wajima;Ceram. Int.,2009
3. Development of New Utilization of Materials, Natural Zeolite and its Utilization, No. 111 Committee, Japan Society for the Promotion of Science, Tokyo, 1994, pp. 318–325.
4. M. Koyama, T. Hori, Y. Kitayama, IARC report, Kyoto University, vol. 2, 1976, 11–14.
5. The presence of calcium in the hydrothermal conversion of amorphous aluminosilicates into zeolites: interference and removal;Catalfamo;Mater. Eng.,1994