TY - JOUR AU - Ramayyan, A. TI - On $n$th order differential equations over Hardy fields JO - Kybernetika PY - 1994 SP - 461 EP - 470 VL - 30 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_1994__30_4_a7/ LA - en ID - KYB_1994__30_4_a7 ER -