Tian, G. Degeneracy of the ground states at half-filling and the existence of the η-pairing off-diagonal long-range order in the negative-U Hubbard models. Elsevier.
Chicago Style (17th ed.) CitationTian, G.-S. Degeneracy of the Ground States at Half-filling and the Existence of the η-pairing Off-diagonal Long-range Order in the Negative-U Hubbard Models. Amsterdam: Elsevier.
MLA (9th ed.) CitationTian, G.-S. Degeneracy of the Ground States at Half-filling and the Existence of the η-pairing Off-diagonal Long-range Order in the Negative-U Hubbard Models. Elsevier.
Warning: These citations may not always be 100% accurate.