Quenching (English Wikipedia)

J. Vanpaemel. HISTORY OF THE HARDENING OF STEEL: SCIENCE AND TECHNOLOGY. Journal de Physique Colloques, 1982, 43 (C4), pp. C4-847-C4-854. DOI:10.1051/jphyscol:19824139; https://hal.archives-ouvertes.fr/jpa-00222126.

doi.org (Global: 2^nd place; English: 2^nd place)

Legerská, M.; Chovanec, J.; Chaus, Alexander S. (2006). "Development of High-Speed Steels for Cast Metal-Cutting Tools". Solid State Phenomena. 113: 559–564. doi:10.4028/www.scientific.net/SSP.113.559. S2CID 137397169. Retrieved 2019-04-05.
Mackenzie, D. S. (June 2008). "History of quenching". International Heat Treatment and Surface Engineering. 2 (2): 68–73. doi:10.1179/174951508x358437. ISSN 1749-5148.

Legerská, M.; Chovanec, J.; Chaus, Alexander S. (2006). "Development of High-Speed Steels for Cast Metal-Cutting Tools". Solid State Phenomena. 113: 559–564. doi:10.4028/www.scientific.net/SSP.113.559. S2CID 137397169. Retrieved 2019-04-05.

Legerská, M.; Chovanec, J.; Chaus, Alexander S. (2006). "Development of High-Speed Steels for Cast Metal-Cutting Tools". Solid State Phenomena. 113: 559–564. doi:10.4028/www.scientific.net/SSP.113.559. S2CID 137397169. Retrieved 2019-04-05.

Mackenzie, D. S. (June 2008). "History of quenching". International Heat Treatment and Surface Engineering. 2 (2): 68–73. doi:10.1179/174951508x358437. ISSN 1749-5148.
Craddock, Paul T. (2012). "Metallurgy in the Old World". In Silberman, Neil Asher (ed.). The Oxford companion to archaeology. Vol. 1 of 3 (2nd ed.). New York: Oxford University Press (published 2012-10-12). pp. 377–380. ISBN 9780199739219. OCLC 819762187.
Williams, Alan (2012-05-03). The sword and the crucible: a history of the metallurgy of European swords up to the 16th century. History of Warfare. Vol. 77. Leiden: Brill. p. 22. ISBN 9789004229334. OCLC 794328540.
Moorey, P. R. S. (Peter Roger Stuart) (1999). Ancient mesopotamian materials and industries: the archaeological evidence. Winona Lake, Ind.: Eisenbrauns. pp. 283–85. ISBN 978-1575060422. OCLC 42907384.
Forbes, R. J. (Robert James) (1972-01-01). Studies in ancient technology. Metallurgy in Antiquity, part 2. Copper and Bronze, Tin, Arsenic, Antimony and Iron. Vol. 9 (2d rev. ed.). Leiden: E.J. Brill. p. 211. ISBN 978-9004034877. OCLC 1022929.