中国科学院数学与系统科学研究院期刊网
AMS
The Essential Spectrum and Banach Reducibility of Operator Weighted Shifts
Jue Xian LI, You Qing JI, Shan Li SUN
Acta Mathematica Sinica . 2001, (3): 413 -424 .  DOI: 10.1007/s101149900033