S. Miertuš, E. Scrocco, and J. Tomasi, “Electrostatic Interaction of a Solute with a Continuum. A Direct Utilization of ab initio Molecular Potentials for the Prevision of Solvent Effects,” Chem. Phys., 55 (1981) 117-29. DOI: 10.1016/0301-0104(81)85090-2