TY - JOUR IS - 1-4 SP - 251 UR - http://www.acta.hu A1 - Shi Ying Guang EP - 259 KW - Matematika JF - Acta scientiarum mathematicarum ID - acta15572 SN - 0001-6969 Y1 - 1995/// VL - 61 N1 - Bibliogr.: 259. p.; Abstract TI - Some extremal problems concerning polynomials AV - restricted ER -