@inproceedings{e.1954on,
title={On the linear and angular cluster sets of functions meromorphic in the unit circle},
author={E. F. Collingwood},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203139492479794},
booktitle={Acta Mathematica},
volume={91},
number={1},
pages={165-185},
year={1954},
}
E. F. Collingwood. On the linear and angular cluster sets of functions meromorphic in the unit circle. 1954. Vol. 91. In Acta Mathematica. pp.165-185. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203139492479794.