Frey, Jann A., and Samuel Leutwyler. “Binding Energies of Hydrogen-Bonded Cis-Amide and Nucleobase Dimers: An Evaluation of DFT Performance”. CHIMIA 59, no. 7-8 (July 1, 2005): 511. Accessed April 9, 2025. https://www.chimia.ch/chimia/article/view/2005_511.