Hussein, M.Z.b., et al. “Intercalation of Anthraquinone-2-Sulphonate into Magnesium- Aluminum Layered Double Hydroxide and Its Calcined Products by Ion Exchange and Memory Effect Properties”. Eurasian Chemico-Technological Journal, vol. 4, no. 3, Aug. 2002, pp. 175-81, doi:10.18321/ectj531.