SEARCH Articles Figures Tables Diatomic overlap Intermediate Neglect of Diatomic differential Overlap Modified neglect of diatomic differential overlap Neglect Neglect of Diatomic Differential Overlap NDDO) Neglect of Diatomic Differential Overlap NDDO) method Neglect of Diatomic Differential Overlap method Neglect of Diatomic Overlap Neglect of Differential Overlap Neglect of diatomic differential overlap NDDO) approximation Neglect of diatomic differential overlap NDDO) model Neglect of diatomic differential overlap models Neglect of overlap Overlap differential