TY - JOUR AU - Andres, Ján TI - On some modification of the Levinson operator and its application to a three-point boundary value problem JO - Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica PY - 1990 SP - 35 EP - 43 VL - 29 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AUPO_1990__29_1_a2/ LA - en ID - AUPO_1990__29_1_a2 ER -