D.  Ghosh, Kosenkov, D., Vanovschi, V., Williams, C. F., Herbert, J. M., Gordon, M. S., Schmidt, M. W., Slipchenko, L. V., and Krylov, A. I., ?Non-covalent interactions in extended systems described by the effective fragment potential method: theory and application to nucleobase oligomers?, Journal of Physical Chemistry A, vol. 114, no. 48, 2010.