1. GOST 21014-88, Rolled Products Made of Ferrous Metals. Terms and Definitions for Surface Defects.
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4. A. I. Stroganov, G. A. Khasin, A. N. Chernenko, and A. S. Arobyshevskii, Quality of the Surface of Metal [in Russian], Metallurgiya, Moscow (1985).
5. V. V. Pravosudovich, Nature and Classification of Surface Defects on Rolled Products: Abstract of a Paper, Mater. VINITI (1997), pp. 1–9.