TY - JOUR AU - I. N. Sergeev TI - Properties of characteristic frequencies of linear equations of arbitrary order JO - Trudy Seminara im. I.G. Petrovskogo PY - 2013 SP - 414 EP - 442 VL - 29 IS - 29 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TSP_2013_29_29_a12/ LA - ru ID - TSP_2013_29_29_a12 ER -