Rappe92

A. K. Rappé, C. J. Casewit, K. S. Colwell, W. A. G. III, and W. M. Skiff, “UFF, a full periodic-table force-field for molecular mechanics and molecular-dynamics simulations,” J. Am. Chem. Soc., 114 (1992) 10024-35. DOI: 10.1021/ja00051a040