@inproceedings{b.1956die,
title={Die Reduktionstheorie Der Positiven Quadratischen Formen},
author={B. L. van der Waerden},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203146124467841},
booktitle={Acta Mathematica},
volume={96},
number={1},
pages={265-309},
year={1956},
}