https://lonwinchem.en.made-in-china.com/product/XGWpclgDHyVE/China-Nbc-Targets-Niobium-Carbide-Ceramic-Sputtering-Targets.html
Nbc Targets Niobium Carbide Ceramic Sputtering Targets - Niobium Carbide Sputtering Targets and Nbc...
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https://liu.diva-portal.org/smash/record.jsf?pid=diva2%3A812558
Optical properties and Zeeman spectroscopy of niobium in silicon carbide
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