中国科学院数学与系统科学研究院期刊网
ON APPROXIMATION BY FELLER OPERATORS FOR FUNCTIONS HAVING DISCONTINUITY POINTS OF THE FIRST KIND
Guo Shun-sheng
Acta Mathematicae Applicatae Sinica . 1991, (1): 57 -65 .  DOI: 10.12387/C1991008