Aghaie, H., Monajjemi, M., Ghassemi, Gh., Kia, M. (2005). An ab initio quantum chemical investigation of TOMS nmr SHIELDING TENSORS IN Adenine-thymine, Adenine-uracil, Guanine-Cytosine & uracil-quartet: comparison between theoretical and experimental results. *Journal of Physical & Theoretical Chemistry*, 2(1), 21-27.