中国科学院数学与系统科学研究院期刊网
The Selfadjointness and Essential Spectrum of a Generalized Schrdinger Operator
Xian Wen ZHANG,Quan ZHENG
Acta Mathematica Sinica, Chinese Series . 2002, (2): 295 -300 .  DOI: 10.12386/A2002sxxb0037