@inproceedings{tomas1980analytic,
title={Analytic ramifications and flat couples of local rings},
author={Tomas Larfeldt, and Christer Lech},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203253884484293},
booktitle={Acta Mathematica},
volume={146},
number={1},
pages={201-208},
year={1980},
}
Tomas Larfeldt, and Christer Lech. Analytic ramifications and flat couples of local rings. 1980. Vol. 146. In Acta Mathematica. pp.201-208. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203253884484293.