@inproceedings{edgar1966some,
title={Some orthogonal matrices and related orthogonal functions systems},
author={Edgar Asplund, and Harold S. Shapiro},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203435507279053},
booktitle={Arkiv for Matematik},
volume={6},
number={4},
pages={291-298},
year={1966},
}
Edgar Asplund, and Harold S. Shapiro. Some orthogonal matrices and related orthogonal functions systems. 1966. Vol. 6. In Arkiv for Matematik. pp.291-298. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203435507279053.