@article{JSFU_2011_4_2_a2,
     author = {Sergey V. Nikolaev and Sergey G. Ovchinnikov},
     title = {Cluster perturbation theory for the {Hubbard} model: the pinning of chemical potential},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {162--167},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2011_4_2_a2/}
}