%0 Journal Article %A Schmidt, H. M. %D 1989 %T Partitions in the Perturbation-Theory of N-Electron Systems .3. The 3rd-Order Energy %J Journal of Physics A-Mathematical and General %V 22 %@ 0305-4470 %R 10.1088/0305-4470/22/11/020  %I Institute of Physics Publishing %P 1799–1806 %N 11 %U https://hdl.handle.net/10442/6563 %> Αποθετήριο Ήλιος / ΕΙΕ