中国科学院数学与系统科学研究院期刊网
OPTIMAL APPROXIMATION ORDER AND ITS CHARACTERIZATION FOR MULTIVARIATE STANCU POLYNOMIALS
Fei Long CAO, Ru Yue YANG
Acta Mathematicae Applicatae Sinica . 2004, (2): 218 -229 .  DOI: 10.12387/C2004025