@inproceedings{Bethke:2019rn,
  author = "Bethke, Siegfried",
  title = "{Pre-2019 summaries of $α_s$}",
  doi = "10.22323/1.365.0001",
  booktitle = "Proceedings of alphas-2019: Workshop on precision measurements of the QCD coupling constant {\textemdash} PoS(ALPHAS2019)",
  year = 2019,
  volume = "365",
  pages = "001"
}