TY - JOUR AU - V. A. Tkachenko TI - Eigenfunction Expansions Associated with One-Dimensional Periodic Differential Operators of Order~$2n$ JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 2007 SP - 66 EP - 89 VL - 41 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_2007_41_1_a4/ LA - ru ID - FAA_2007_41_1_a4 ER -