Open problems in strongly correlated electron systems / Ed. by J. Bonca and others. - Dordrecht ; Boston ; London : Kluwer Acad. Publ, 2001. - xvi, 459 p. - NATO Science Series Series II Mathematics, Physics and Chemistry Vol. 15 . ISBN: 0-7923-6896-7 Subjects--Topical Terms: Electron configuration-Congresses