Mirzaei M, Hadipour NL, Ahmadi K. Investigation of C-H...O=C and N-H...OC hydrogen-bonding interactions in crystalline thymine by DFT calculations of O-17, N-14 and H-2 NQR parameters. Biophys Chem. 2007 Feb;125(2-3):411–5. doi: 10.1016/j.bpc.2006.10.007. PMID: 17175092.