Hard superconducting nitrides.
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Proc Natl Acad Sci U S A. 2005 Mar 1;102(9):3198-201. doi: 10.1073/pnas.0500174102. Epub 2005 Feb 22.
Proc Natl Acad Sci U S A. 2005.
PMID: 15728352
Free PMC article.