October 6, 2011 - Kagawa, A.; Murokawa, Y.; Takeda, K.; Kitagawa, M. J. Magn. Reson. 2009, 197, 9. http://dx.doi.org/10.1016/j.jmr.2008.11.009
October 6, 2011 - Chandrakumar, N. Journal of the Indian Institure of Science 2010, 90, 133. http://journal.library.iisc.ernet.in/vol201001/Chandrakumar.pdf Dynamic nuclear polarization was first predicted — and, shortly thereafter, established experimentally — in 1953, the first demonstration being on Lithium metal.
October 3, 2011 - Hu, K.-N., Polarizing agents and mechanisms for high-field dynamic nuclear polarization of frozen dielectric solids. Solid State Nuclear Magnetic Resonance, 2011.