TY - BOOK AU - Ovchinnikov,S.G. AU - Val'kov,V.V. TI - Hubbard operators in the theory of strongly correlated electrons SN - 1860944302 PY - 2004/// CY - London PB - Imperial College KW - Hubbard model KW - Electron configuration KW - Mathematical models N1 - Includes bibliographical references and index ER -