Carbon-13 nuclear magnetic resonance of polymers spinning at the magic angle by Jacob Schaefer and E. O. Stejskal 2026-11-05
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Journal of the American Chemical Society98(4),1031–1032(1976); DOI10.1021/ja00420a036. Original first-page text and Figure1 verified through indexed original PDF: polysulfone CP spectra with/without magic-angle spinning and solution comparison. Publisher byline Jacob Schaefer and E.O.Stejskal verified. Use1976 issue date, not the landing page digital posting date in2002.
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Development of REDOR rotational-echo double-resonance NMR by Jacob Schaefer (2011) 2026-11-05
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Historical Perspective, Journal of Magnetic Resonance213(2),421–422 (2011), signed Jacob Schaefer, commenting on the1989 Terry Gullion/Jacob Schaefer report. Original indexed abstract: pubmed.ncbi.nlm.nih.gov/21890391/ . Full primary paper mirrored at electronicsandbooks.com/edt/manual/Magazine/J/Journal%20of%20Magnetic%20Resonance/2011/Volume%20213%2C%20Issue%202%2C%20Pages%20213-574%20%28December%202011%29/421_422.pdf . Page422/Figure1:29May1987 alanine record,50.3MHz,3.2kHz spinning,10 rotor periods; XY8 discussion. This source is the2011 first-person retrospective, not the original1989 article.
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