MathSciDoc: An Archive for Mathematician ∫

@inproceedings{p.1986a,
  title={A note on existence of global classical solutions to nonlinear wave equations},
  author={P. Kumlin},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203526398411482},
  booktitle={Arkiv for Matematik},
  volume={26},
  number={1},
  pages={145-153},
  year={1986},
}