Brown, SPLesage, AElena, BEmsley, L2015-01-082015-01-082015-01-08200410.1021/ja045461phttps://infoscience.epfl.ch/handle/20.500.14299/110096WOS:000224500000032Probing proton-proton proximities in the solid state: High-resolution two-dimensional H-1-H-1 double-quantum CRAMPS NMR spectroscopytext::journal::journal article::research article