@inproceedings{jürgen1992on, title={On the order of prime powers dividing (_{n}^{2n})}, author={Jürgen W. Sander}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203324063776511}, booktitle={Acta Mathematica}, volume={174}, number={1}, pages={85-118}, year={1992}, }