An improvement of Davidson's iteration method: Applications to MRCI and MRCEPA calculations. - Huub J. J. Van Dam; J. H. Van Lenthe; Gerard L. G. Sleijpen; Henk A. van der Vorst (J. Comput. Chem., 1996)

Starting SCF calculations by superposition of atomic densities. - J. H. Van Lenthe; Renate Zwaans; Huub J. J. Van Dam; M. F. Guest (J. Comput. Chem., 2006)