MathSciDoc: An Archive for Mathematician ∫

@inproceedings{david1969the,
  title={The lower bound conjecture for 3- and 4-manifolds},
  author={David W. Walkup},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203220190566096},
  booktitle={Acta Mathematica},
  volume={125},
  number={1},
  pages={75-107},
  year={1969},
}