TY - JOUR AU - A. P. Saiko TI - Krylov–Bogoliubov–Mitropolsky averaging used to construct effective Hamiltonians in the theory of strongly correlated electron systems JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2009 SP - 287 EP - 294 VL - 161 IS - 2 UR - http://geodesic.mathdoc.fr/item/TMF_2009_161_2_a12/ LA - ru ID - TMF_2009_161_2_a12 ER -