TY - JOUR AU - Olach, Rudolf TI - Oscillation of first order linear retarded equations JO - Mathematica slovaca PY - 2001 SP - 547 EP - 557 VL - 51 IS - 5 UR - http://geodesic.mathdoc.fr/item/MASLO_2001_51_5_a4/ LA - en ID - MASLO_2001_51_5_a4 ER -