1. Agbim, N.N. and Doxtader, K.G., 1975, Microbial degradation of zinc silicates, Soil Biol. Biochem., 7, 275–280.
2. Alexander M, 1977, Introduction to Soil Microbiology, John Wiley & Sons Inc., New York.
3. Aristovskaya, T.V., Daragan, A.Yu., Zykina, L.V. and Kutuzova, R.S., 1969, Microbial factors in the movement of some mineral elements in the soil, Soviet Soil Sci., 5, 538–546.
4. Aristovskaya, T.V. and Kutuzova, R.S., 1968, Microbial factors in the extraction of silicon from slightly soluble natural compounds, Soviet Soil Sci., 12, 1653–1659.
5. Aristovskaya, T.V. and Zykina, L.V., 1978, Biological factors of aluminum migration and accumulation in soils and weathering crusts, Problems of Soil Science, p. 175–182, Contrib. XI Internat. Congr. Soil Sci., Nauka, Moscow.