MathSciDoc: An Archive for Mathematician ∫

@inproceedings{h.1970the,
  title={The homology groups of some ordered systems},
  author={H. B. Griffiths},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203226240800138},
  booktitle={Acta Mathematica},
  volume={129},
  number={1},
  pages={195-235},
  year={1970},
}