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Kumareson, P., Devanarayanan, S. Microhardness studies on calcium sulphate dihydrate crystals grown in silica gel in the presence and absence of barium chloride as additive. J Mater Sci Lett 8, 389–390 (1989). https://doi.org/10.1007/BF00720682
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DOI: https://doi.org/10.1007/BF00720682