1. H.-P. Rieck, Process for the preparation of crystalline sodium silicates, US Patent 4,585,642, 1986.
2. H.-P. Rieck, Washing and cleaning agent containing surfactants, builder, and crystalline layered sodium silicate, US Patent 4,820,439, 1989.
3. The evolution of detergent builders from phosphates to zeolites to silicates;Bauer;Tenside Surf. Deterg.,1999
4. The crystal structure of δ-Na2Si2O5;Kahlenberg;J. Solid State Chem.,1999
5. X. Ai, J. Dong, F. Deng, C. Ye, Hydration of layered sodium silicate SKS-6 studied by solid state NMR, Proceedings of International Ninth Beijing Conference and Exhibition on Instrumental Analysis (2001: Beijing, China), E85-86, Peking University Press, Beijing, 2001.