Tanguy Rouxel, Jean-Christophe Sangleboeuf, Jean-Pierre Guin, V. Keryvin, G. D. Soraru. Surface damage resistance of gel-derived oxycarbide glasses: Hardness, toughness, and scratchability.
Journal of the American Ceramic Society, Wiley, 2001, 84 (10), pp.2220--2224.
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