TY - JOUR AU - M. V. Smolentsev TI - The existence of a linear third-order equation with a countable frequency spectrum JO - Trudy Seminara im. I.G. Petrovskogo PY - 2014 SP - 242 EP - 251 VL - 30 IS - 30 UR - http://geodesic.mathdoc.fr/item/TSP_2014_30_30_a13/ LA - ru ID - TSP_2014_30_30_a13 ER -