Inclusion of explicit electron-proton correlation in the nuclear-electronic orbital approach using Gaussian type geminal functions
103. A. Chakraborty, M.V. Pak, and S. Hammes-Schiffer, “Inclusion of explicit electron-proton correlation in the nuclear-electronic orbital approach using Gaussian type geminal functions,” J. Chem. Phys. 129, 014101 (2008).