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A multiple-field (23)Na NMR study of sodium species in porous carbons.
Freitas JC, Schettino MA Jr, Emmerich FG, Wong A, Smith ME. Freitas JC, et al. Among authors: schettino ma jr. Solid State Nucl Magn Reson. 2007 Dec;32(4):109-17. doi: 10.1016/j.ssnmr.2007.10.002. Epub 2007 Oct 11. Solid State Nucl Magn Reson. 2007. PMID: 17997287