Titanium (English Wikipedia)

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Emsley 2001, p. 451 Emsley, John (2001). "Titanium". Nature's Building Blocks: An A-Z guide to the elements. Oxford, England, UK: Oxford University Press. ISBN 978-0-19-850340-8.
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Karimi-Sibaki, E.; Kharicha, A.; Wu, M.; Ludwig, A.; Bohacek, J. (2020). "A Parametric Study of the Vacuum Arc Remelting (VAR) Process: Effects of Arc Radius, Side-Arcing, and Gas Cooling". Metallurgical and Materials Transactions B. 51 (1): 222–235. doi:10.1007/s11663-019-01719-5. ISSN 1073-5615.
Krasnov, A. A.; Semenov, A. M. (2023). "Lumped Ultra-High Vacuum Pumps Based on Non-Evaporable Getters". Bulletin of the Russian Academy of Sciences: Physics. 87 (5): 568–572. doi:10.3103/S1062873822701726. ISSN 1062-8738.
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