Authors: Jan Henrik Ardenkjær-Larsen and others.
Primary paper: Increase in signal-to-noise ratio of greater than 10,000 times in liquid-state NMR, PNAS 100, 10158–10163 (2003). pmc.ncbi.nlm.nih.gov/articles/PMC193532/
Cited passages: low-temperature microwave-assisted polarization transfer and preservation by rapid dissolution; introduction distinguishing different hyperpolarization routes.