7A. Violante, A. De Cristofaro, M. A. Rao, et al. Physicochemical propertiesof protein - smectite and protein - Al ( OH ) x - smectite Complexes [ J ]. ClayMinerals, 1995(30) : 325 -336.
10A. Singer, P. M. Huang. Humic acid effect on aluminum interlayering inmontmorillonite [ J ]. Soil Science Society of America Journal, 1993,57(1): 271-279.