@inproceedings{dr.1980a,
title={A constructive method for$L$^{$p$}-approximation by analytic functions},
author={Dr. Per Lindberg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203511973399363},
booktitle={Arkiv for Matematik},
volume={20},
number={1},
pages={61-68},
year={1980},
}
Dr. Per Lindberg. A constructive method for$L$^{$p$}-approximation by analytic functions. 1980. Vol. 20. In Arkiv for Matematik. pp.61-68. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203511973399363.