@inproceedings{göte1962on,
title={On sign-independent and almost sign-independent convergence in normed linear spaces},
author={Göte Nordlander},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426419404975},
booktitle={Arkiv for Matematik},
volume={4},
number={4},
pages={287-296},
year={1962},
}
Göte Nordlander. On sign-independent and almost sign-independent convergence in normed linear spaces. 1962. Vol. 4. In Arkiv for Matematik. pp.287-296. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203426419404975.