TY - JOUR AU - L. M. Kuks TI - Unboundedness of the solutions and a comparison theorem of Sturm type for higher order parabolic systems on the plane JO - Differencialʹnye uravneniâ PY - 1978 SP - 878 EP - 884 VL - 14 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1978_14_5_a11/ LA - ru ID - DE_1978_14_5_a11 ER -