TY - JOUR AU - V. Kozlov AU - J. Taskinen TI - Floquet problem and center manifold reduction for ordinary differential operators with periodic coefficients in Hilbert spaces JO - Algebra i analiz PY - 2020 SP - 191 EP - 218 VL - 32 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_2020_32_3_a8/ LA - en ID - AA_2020_32_3_a8 ER -