@inproceedings{yaroslav2017counterexamples,
title={Counterexamples to Strassen’s direct sum conjecture},
author={Yaroslav Shitov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191128120710905887544},
booktitle={Acta Mathematica},
volume={222},
number={2},
pages={363 – 379},
year={2017},
}