1. A method for the solution of many-body problems in quantum mechanics;Fock;Zeitschrift fur Physik,1930
2. The wave mechanics of an atom with a non-Coulomb central field;Hartree;Proceedings of Cambridge Philosophical Society,1928
3. Electron correlations in narrow energy bands;Hubbard;Proceedings of the Royal Society of London,1963
4. Electron correlations in narrow energy bands II-The degenerate band case;Hubbard;Proceedings of the Royal Society of London,1964
5. Electron correlations in narrow energy bands III- An improved solution;Hubbard;Proceedings of the Royal Society of London,1964