中国科学院数学与系统科学研究院期刊网
EXISTENCE THEOREMS OF FIXED POINT OF AVERAGE NONEXPANSIVE MAPPINGS IN BANACH SPACE
赵汉宾
Acta Mathematica Sinica, Chinese Series . 1979, (4): 459 -470 .  DOI: 10.12386/A1979sxxb0042