中国科学院数学与系统科学研究院期刊网
AMS
Browder Spectra and Essential Spectra of Operator Matrices
Yun Nan ZHANG, Huai Jie ZHONG, Li Qiong LIN
Acta Mathematica Sinica . 2008, (6): 947 -954 .  DOI: 10.1007/s10114-007-6339-x