@inproceedings{s.1984uniqueness,
title={Uniqueness theorems for operator-valued functions with positive imaginary part, and the singular spectrum in the selfadjoint Friedrichs model},
author={S. N. Naboko},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203523715413459},
booktitle={Arkiv for Matematik},
volume={25},
number={1},
pages={115-140},
year={1984},
}
S. N. Naboko. Uniqueness theorems for operator-valued functions with positive imaginary part, and the singular spectrum in the selfadjoint Friedrichs model. 1984. Vol. 25. In Arkiv for Matematik. pp.115-140. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203523715413459.