@article{TMF_2012_172_3_a10,
     author = {V. M. Zharkov},
     title = {The~functional integral in {the~Hubbard} model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {479--496},
     year = {2012},
     volume = {172},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2012_172_3_a10/}
}