New parallel optimal-parameter fast multipole method (OPFMM). - Cheol Ho Choi; Klaus Ruedenberg; Mark S. Gordon (J. Comput. Chem., 2001)

A MCSCF method for ground and excited states based on full optimizations of successive Jacobi rotations. - Joseph Ivanic; Klaus Ruedenberg (J. Comput. Chem., 2003)

Why does electron sharing lead to covalent bonding? A variational analysis. - Klaus Ruedenberg; Michael W. Schmidt (J. Comput. Chem., 2007)