MathSciDoc: An Archive for Mathematician ∫

@inproceedings{per1972a,
  title={A Banach space with basis constant >1},
  author={Per Enflo},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203450875013183},
  booktitle={Arkiv for Matematik},
  volume={11},
  number={1},
  pages={103-107},
  year={1972},
}