@inproceedings{kirsti1985a,
title={A class of hyponormal operators and weak^{*}-continuity of hermitian operators},
author={Kirsti Mattila},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203524904497469},
booktitle={Arkiv for Matematik},
volume={25},
number={1},
pages={265-274},
year={1985},
}
Kirsti Mattila. A class of hyponormal operators and weak^{*}-continuity of hermitian operators. 1985. Vol. 25. In Arkiv for Matematik. pp.265-274. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203524904497469.