relation: http://acta.bibl.u-szeged.hu/38684/ title: Acta Scientiarum Mathematicarum : Volume 77. Numbers 3-4. date: 2011 type: Folyóirat type: NonPeerReviewed format: full language: hu identifier: http://acta.bibl.u-szeged.hu/38684/1/math_077_numb_003_004.pdf identifier: Acta Scientiarum Mathematicarum : Volume 77. Numbers 3-4. (2011) relation: http://www.acta.hu