@inproceedings{louis1970boundary,
title={Boundary problems for pseudo-differential operators},
author={Louis Boutet de Monvel},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203221129398104},
booktitle={Acta Mathematica},
volume={126},
number={1},
pages={11-51},
year={1970},
}