@article{TMF_2009_161_2_a12,
     author = {A. P. Saiko},
     title = {Krylov--Bogoliubov--Mitropolsky averaging used to construct effective {Hamiltonians} in the~theory of strongly correlated electron systems},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {287--294},
     publisher = {mathdoc},
     volume = {161},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2009_161_2_a12/}
}