TY - JOUR AU - Fišnarová, Simona TI - Oscillatory properties of fourth order self-adjoint differential equations JO - Archivum mathematicum PY - 2004 SP - 457 EP - 469 VL - 40 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_2004__40_4_a11/ LA - en ID - ARM_2004__40_4_a11 ER -