Electronic excitation and singlet-triplet coupling in uracil tautomers and uracil-water complexes - A quantum chemical investigationC. M. Marian, F. Schneider, M. Kleinschmidt and J. TatchenEur. Phys. J. D, 20 3 (2002) 357-367DOI: https://doi.org/10.1140/epjd/e2002-00158-3