W. A. deJong, R. J. Harrison, and D. A. Dixon, “Parallel Douglas-Kroll energy and gradients in NWChem: Estimating scalar relativistic effects using Douglas-Kroll contracted basis sets,” J. Chem. Phys., 114 (2001) 48-53. DOI: 10.1063/1.1329891
W. A. deJong, R. J. Harrison, and D. A. Dixon, “Parallel Douglas-Kroll energy and gradients in NWChem: Estimating scalar relativistic effects using Douglas-Kroll contracted basis sets,” J. Chem. Phys., 114 (2001) 48-53. DOI: 10.1063/1.1329891
