TY - JOUR KW - Matematika TI - Existence of generalized Gaussian Birkhoff quadrature formulas JF - Acta scientiarum mathematicarum SP - 603 A1 - Shi Ying Guang AV - restricted UR - http://www.acta.hu N1 - Bibliogr. 612. p.; Abstract ID - acta15497 Y1 - 1994/// IS - 3-4 VL - 59 EP - 612 SN - 0001-6969 ER -