@inproceedings{tristan1993everywhere,
title={Everywhere discontinuous harmonic maps into spheres},
author={Tristan Rivière},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203325631632523},
booktitle={Acta Mathematica},
volume={175},
number={2},
pages={197-226},
year={1993},
}