SEARCH Articles Figures Tables Dirac delta function models Dirac vector model Dirac-Woods-Saxon model Fermi-Thomas-Dirac atomic model Hartree Dirac model, relativistic Heisenberg-Dirac-Van Vleck model, The Dirac-Hartree-Fock-Breit model Thomas-Fermi-Dirac model Thomas-Fermi-Dirac-Weizsacker model