@book{229633,
	author = {Ovchinnikov, S. G. and Valkov, V. V. and ProQuest (Firm)},
	title = {Hubbard operators in the theory of strongly correlated electrons},
	publisher = {Imperial College Press,},
	year = {c2004.},
	address = {London :},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=238340}
}