@techreport{Berghammer_FGH_18:tr,
    month            = jan,
    numpages         = {23},
    keywords         = {relation algebra; path; tree},
    institution      = {Data61, CSIRO},
    publisher        = {arXiv.org},
    author           = {Berghammer, Rudolf and Furusawa, Hitoshi and Guttmann, Walter and Hoefner, Peter},
    title            = {Relational Characterisations of Paths},
    paperurl         = {https://trustworthy.systems/publications/csiro_full_text/Berghammer_FGH_18%3Atr.pdf},
    year             = {2018},
    date             = {2018-1-12}
  }