@inproceedings{srikanth2017examples,
title={Examples of finite free complexes of small rank and small homology},
author={Srikanth B. Iyengar, and Mark E. Walker},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191128113703877842538},
booktitle={Acta Mathematica},
volume={221},
number={1},
pages={143 – 158},
year={2017},
}

Srikanth B. Iyengar, and Mark E. Walker. Examples of finite free complexes of small rank and small homology. 2017. Vol. 221. In Acta Mathematica. pp.143 – 158. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191128113703877842538.