中国科学院数学与系统科学研究院期刊网
The Spectrum for Algebraically Paranormal Operators
Xiao Hong CAO(1); Mao Zheng GUO(2)
Acta Mathematica Sinica, Chinese Series . 2008, (3): 593 -600 .  DOI: 10.12386/A2008sxxb0070