Temperature Dependence of High Field 13C Dynamic Nuclear Polarization Processes below 35 Kelvin
S.A. Walker, D.T. Edwards, T. Siaw, B.D. Armstrong, S. Han, Phys. Chem. Chem. Phys. 15 (36) (2013) 15106-15120
https://doi.org/10.1039/C3CP51628H PMID: 23925724.